archived-lighting

[violet arch]

ok

I'll test and see

is there anything else it could be

changed it and nothing changed

@deft fiber

is there anything else

[deft fiber]

Did you follow my advice

[violet arch]

whats uv overlap

[deft fiber]

You can go through the debug views first and see if any of them highlights anything in red

[violet arch]

what debug views

[deft fiber]

https://docs.unity3d.com/Manual/GIVis.html

[violet arch]

these

ok

I got it now

whent to uv overlaping and this is what I see

is that bad

I also see this

@deft fiber

[deft fiber]

That's a lot of texel invalidity
Looks like you most likely have overlapping geometry

[violet arch]

how do I fix

[deft fiber]

Check if there is overlapping geometry and remove it if there is

[violet arch]

what does overlapping geometry mean

?

duplicated objects or something

but this problem jsut poped up out of now where and it use to bake fine

[deft fiber]

Duplicated objects or duplicated mesh polygons likely
The screenshot shows texel invalidity when there is no obvious cause for it, and copious amounts of z-fighting so that leads me to believe you have multiple levels stacked together

[violet arch]

but when I move the object there is only one

@deft fiber

I really dont want to make a new project

I only have one object

[deft fiber]

The mesh itself could have duplicated faces

[violet arch]

I could try that hold on

it didnt work

@deft fiber

not double face or none

[dim pollen]

What can cause this?, tried** Cast shadows: two sided**, and **lowering the depth bios **

[somber sapphire]

I'm facing really strange issue with lighting for additive scenes. The Scene 7 is baked seperatly, because it's intented to be very dark. The rest of the scenes was baked together with preloader as a Active Scene with directional lights.

When I loaded Scene 7 at the same time as the rest it's appear super bright, the same thing is for the runtime, but when I load it in different order it looks ok.

The issue is fixed when I set Scene 7 as an Active, but I don't want to set it as active.
Do you know what can cause it?

[blissful ether]

Try clipping the wall into the floor slightly

Could be a floating point thing

[deft fiber]

I believe in this case the bias settings combined with low shadow resolution and thin-ness of the wall cause the some shadowmap pixels to spill through
Bias can't be changed much without running into more issues, but you could try increasing shadow resolution and/or thickening the wall
If your shadow casting light is a spot light, check its angle
Spot lights with very wide angles of over 90° will start losing shadow resolution exponentially

[gritty fox]

Not sure what's going on all of a sudden but I can't bake lighting

It's all mixed lighting and on shadowmask, marked stuff as static and it's usually just fine

But all of a sudden I can't bake and it just goes straight to 99% finalising bake and just stays there saying 1 second left

Never had this problem before

[blissful ether]

I think there's an option to completely purge the light cache

And obviously do a full reboot

Also try switching from CPU -> GPU bake or vice versa

[royal mantle]

I finally implemented proper viewmodel rendering into my game, but it doesn't receive shadows- is there any way to fix this?
(I have a main camera, which culls viewmodels, and a sub-camera, which culls everything except viewmodels and overlays it on the screen.)

[deft fiber]

iirc you'll have to use Render Objects renderer feature instead of overlay cameras if you want shadows

That doesn't give you the option to change FoV of the viewmodel, but there's at least one hack around that such as the one used by Metro Exodus
https://youtu.be/pM2Lr5roSPc?t=275

[oak dawn]

hello everyone, how would i be able to modify the color of the environment lighting's intensity and color through script?

[deft fiber]

I think you only need to change this, if using a single color
https://docs.unity3d.com/ScriptReference/RenderSettings-ambientLight.html

If you use the three color gradient then you need to change all three
If you use skybox ambient lighting then it could be trickier
In that case you may need to update both the ambient cubemap as well as generating it into SH format but I'm not totally sure

https://docs.unity3d.com/ScriptReference/RenderSettings-ambientIntensity.html this would only control the intensity

[oak dawn]

what about the intensity though?

[oak dawn]

just so you know you can easily change the skybox's ambient lighting by doing RenderSettings.ambientIntensity

[deft fiber]

I linked that one as well!
The sky colors are in HDR format so the colors themselves can represent any intensity
A separate variable for it is convenient if you only need to change intensity and don't wish to touch the colors

[oak dawn]

oh sorry, i didn't notice that :D

but i would like to create 2 variables, a color and a float for the intensity

so i could modify the color and then modify the float for the intensity, i feel like that would just be the most comfortable

the reason i'm asking is since if i create a Color variable there's no intensity there, so i don't understand how would you pass on the intensity into the RenderSettings.ambientLight

or does it use the alpha or something?

[deft fiber]

Color itself can contain the intensity in three channels
Non-HDR colors are in 0-1 range in each channel as you'd expect
HDR is much the same but with each channel multiplied by some intensity factor
1f, .5f, 0f is orange, 2f, 1f, 0f is a glowing bright orange, for example

It depends on what the Color is being used for if the HDR intensity can be used, or if it's clamped to 1

[oak dawn]

oh so i just do new Color(1f * intensity, 1f * intensity, 1f*intensity); right?

[deft fiber]

Ambient lighting seems to accept both HDR color and a separate intensity variable on top of that, so you can use either workflow

[deft fiber]

Yes

[oak dawn]

thanks

[deft fiber]

You can see how the inspector increases color values when displaying them in 1-0 range and increasing intensity in the inspector's color picker
Apparently it uses color*(2^intensity), but any intensity value or function that you prefer will work

[vapid bone]

Does anyone know what causes this when moving the camera around with lightmaps? I am using Unity 2023.1.4, I have switched everything to baked lighting and baked the lightmaps for this object. It looks fine when scaled normally, but when I scale down it starts having this blotchy effect.

[kind kraken]

These ceiling lamps have an emissive map that actually works, but they are not acting like lights themselves, so I added a point light, my goal is to achieve a bright indoor scene, I'm also using URP, what can I do to achieve that result?

In this image I was using the Deferred rendering path

and I achieved the result by just adding point lights

[kind kraken]

but here as you can see (now I'm using forward) the ambient light that I want to achieve is a little bit forced

I even found a way to achieve this by using forward+ that avoids the problem of "per object light" and so I could add more lights but idk if there will be performance issues even baking the lights

[blissful ether]

My URP scene moving objects wont receive shadows from my mixed type directional light. They will receive shadows only from other moving objects, but I'd like them to be received from the larger environment also.

[deft fiber]

Is this HDRP? Looks like SSAO or some other screenspace effect artifact
Could also be related to realtime shadow bias and distance, or shadow cascades
Doesn't look like anything baking should cause

[deft fiber]

Forward, deferred and forward+ rendering paths look exactly the same, but have different technical limitations
If you want good and natural ambient lighting you'll want to use baked lightmapping

[blissful ether]

I think I found my answer, but it's pretty bad :/

https://support.unity.com/hc/en-us/articles/207820473-Mixed-mode-lighting-my-baked-objects-are-not-casting-shadows-on-RealTime-objects

[kind kraken]

yeah I tried but many of the models that i downloaded from the asset store have very bad lightmaps, for instance, i just baked the scene and with even the Generate lightmap UVs option enabled on import settings of the model they look completely black

and I don't even know a thing about lightmapping

[deft fiber]

Shadowmask lighting mode is supposed to solve this problem, but it's the most expensive one out of the three

[blissful ether]

Well that's sad to hear, why is it so expensive? Sounds like it would be more efficient

[deft fiber]

It combines both realtime and baked lights, but also masks shadows out from areas of the baked lightmap where they're occluded by static shadow casters
iirc

It's a pretty complicated system
https://docs.unity3d.com/Manual/LightMode-Mixed-Shadowmask.html
And there's two variants of it

Conversely Baked Indirect doesn't deal with shadows at all, and Subtractive naively overlays baked and realtime shadows

The earlier link is 6 years old so I think it's out of date regarding this

[blissful ether]

This quote could be applied to so many things in unity hahaahahaha

Thank you for this link, I'll read through it

[mild totem]

Hi is it possible to snap a 3d object to a hdri so it looks like its in the hdri? I have a hdri road and i want to place my car so it looks as its on the road

Am using hdrp pipeline

[deft fiber]

Heh, there's intuitive things too luckily! Baked lighting in particular has a lot of very technical processes to it

[deft fiber]

Not possible if the camera ever moves
A HDRi environment exists at virtual infinity
Your best bet is to place the camera in a fixed position and then just eyeball the object's position and rotation relative to it

[deft fiber]

It's hard to use if you don't know how it works
The meshes you have look suitable for baked lightmapping

[mild totem]

Oh ok

[blissful ether]

Honestly yeah, I just wish Unreal didn't lean so heavily into blueprints I find them so rubbish for any type of complicated project, if you're someone who wants to use code it just feels like you're handicapped there, unless you're in a huge team. Unity's C# experience is pretty nice in comparison

[deft fiber]

Particle systems and shader graph likewise are intuitive

[blissful ether]

So after investigation I've found shadowmasks are already enabled for this scene, it's just this part doesn't seem to work:

Real-time shadows from dynamic GameObjects, using the shadow map, up to the Shadow Distance.

As you can see objects cast, but don't receive properly

[deft fiber]

I'd make a test scene in a non-VR-template project to try to rule out project specific stuff

[blissful ether]

Fair idea, I'll try that, thanks

[blissful ether]

Seems to work in an empty URP project. Which should help diagnose, bit weird it's so strangely configured in the VR template.

But I think it's all being done realtime, even with set to mixed

Yeah I don't evern know how to get it to bake in the default project

Enabling it in the lighting settings doesn't seem to do much

[deft fiber]

Don't know how to get what to bake? I understood that it worked right there

[blissful ether]

I think I just needed to mark contribute global illumination

On some stuff

Unsure

Trying a blank scene in my VR project now instead

God knows what hidden settings are in the template scene

Frankly I think the VR template might just need a serious polish up, there are a few things wrong with it

Yeah it seems to work in a new scene with the exact same URP config and light settings

I'll see if porting over the VR functionality ruins it later

[eager geyser]

how can i achieve per-vertex lighting?

[blissful ether]

I made a new directional light other than the pre-given one in my scene and now it seems to work

might look at it later i guess ¯_(ツ)_/¯ to see what was wrong

[blissful ether]

Pretty sure there are options for it in the Asset for shading

Only for additional lights, but might give you a start point

[eager geyser]

hmm, yeah but i need the main lights too

trying to recreate a authentic N64 look, the n64 had its tri-point filtering and Gouraud Shading (aka Per-Vertex lighting)

[blissful ether]

Nevermind I'm a dumbass completely forgot what I was looking for, still broke in that scene /shrug

[blissful ether]

I think writing your own shader would honestly be easiest for this

[blissful ether]

And also I haven't been able to get this working for mixed lights, only realtime :/

[grand zealot]

I honestly didn’t think it was going to be that hard to work with lighting….

[deft fiber]

Realtime lighting is a dozen different hacks working together to produce visuals that sometimes somewhat resemble reality

[undone surge]

Hello hello! quick question ! What's called the tool that allows to bake lighting only what's in the viewport ? So I don't have to bake the entire scene to see if it's good or not ? Thanks :D

[deft fiber]

There is no such tool officially
There's "progressive updates" setting that prioritizes view, though even still only the finished bake is a reliable indicator of the result
You can disable parts of your scene for the duration of a bake in any case

[undone surge]

Meh, so it means, i really need to wait the whole scene to be baked to have an idea of the result :/

[deft fiber]

More or less

[undone surge]

Also, another quick question, I'm trying to bake in gpu but it switches automatically when I'm starting the bake to CPU mode. Does it means my computer is not good enough to run the GPU mode ?

[deft fiber]

You can speed up the bake by baking with GPU, reducing samples and especially the lightmap resolution
It's always important to optimize the scene for bakes by excluding small and high-poly meshes from the lightmap, or from the bake entirely

[undone surge]

Or there is another possible issue ?

Yep, unfortunnetely, I tried to reduce everything ahah

[deft fiber]

It could be falling back to CPU for many reasons
Does the console display any messages when that happens?

[undone surge]

"Falling back to Cpu lightmapper"

"Failed to find a suitable OpenCl device"

" OpenCL GPU device NVIDIA GeForce GTX 1060 3GB from NVIDIA Corporation has less than 4 GB of global memory, ignoring device for lightmapping." - But that's a warning, not an error

[deft fiber]

At least the message is clear why it fell back
Which editor version is it?

[undone surge]

2022.2.17 !

[deft fiber]

I'd make a test project using a newer version like 2022.3., 2023.1 or 2023.2

There's been a lot of improvements to vram requirements with them when baking with low end cards
But I'm not sure which version has which improvements precisely

[undone surge]

Oh, looks good, I'll test that ! Thanks for your help ! 🌸

[deft fiber]

2023.2. should support even as little as 2GB
2022.2.17 is now a now unsupported tech stream version, I would consider upgrading to 2022.3. (though .3.4f1 and .3.5f1 seem to have bugs with canvases and sprite rigging so do tests or make backups first)

[undone surge]

Definetely, tysm !

[tacit minnow]

we've a camera that is far away from the scene's objects; is there a way to tell the first shadow map slice range to start after a certain distance rather than from the camera?

(using URP)

[deft fiber]

I think you'd have to increase the camera's near clipping plane up to that point

[tacit minnow]

ah, that's not unreasonable at all.. ^^' thanks

[oak dawn]

i'm wondering something, would it be possible to make sure that shadows in the built-in render pipeline only get calculated on awake or through scripting? something similar to the option to choose from on awake, every frame, through scripting on reflection probes

and if your answer is bake the lighting, i dislike baking because of the time it takes, and also i want no global illumination, just diffuse lighting and shadows

[deft fiber]

Realtime shadows are only valid for the frame when they're rendered because they depend on what the camera can see and how far they are from it

[oak dawn]

yeah right, all those depth buffers, but i saw HDRP had like an option for "On Awake", does it work the way i want it to there?

[deft fiber]

Yes, HDRP supports shadow caching which kind of does save them for later use

You'd have to make your own implementation of it if you want it into BiRP

[oak dawn]

then for now i guess disabling shadow casting for all dynamic objects should look the same way i intended, not too sure about the performance though

[heavy mulch]

how to fix this shadow? if object close to another object, that shadow like this. and how to make the shadow smooth?

[stuck jetty]

You can disable the shadow from distance to save the performance

[heavy mulch]

i using mixed for lighting

[stuck jetty]

That's because your bias is too high and you don't have enough resolution

[heavy mulch]

lightmap resolution?

[stuck jetty]

No, the resolution for your shadow

Mixed light mode uses realtime shadow

[heavy mulch]

where the setting?

[deft fiber]

You can increase the effective resolution by decreasing shadow distance
And if you're using a spot light, by decreasing its angle

[heavy mulch]

i using point light

the shadow look normal in directional light, but look worse in point light

[deft fiber]

After checking those I'd tweak the light bias values, but carefully since any low or high bias often causes other issues

[heavy mulch]

shadow distance in urp right? i try to decrese to 2 but still worse

i try to change value in dept bias and normal bias but nothing happend

[deft fiber]

If nothing seems to change when you tweak those settings, that may suggest that the URP asset you're modifying is not the active one

[heavy mulch]

is active before i change to bias to custom, before that render pipeline asset

if using renderpipeline asset in bias, and then change value in depth bias, the shadow change

but stil terrible

like this

[blissful ether]

Try tweaking your shadow settings in your URP asset settings to higher quality / softer

I wish there was a fast blur available or something

[merry abyss]

I am pulling shadow coordinate and cascade data in shader, but after upgrading to a newer version of unity, something about how cascade maps are calculated to passed has changed, and I havent been able to find documentation on how it differs 🤔
I went from 2020 to 2021 and the Last Border fade-out is new and I think might be whats breaking my shader?

Is there a place to see all the behind the scenes info on what unity's shadow stuff is doing?
I guess I am looking for essentially a full walkthrough of re-writing unity's lit workflow? but specifically for 2021, like I am guessing such a workflow would have the answers I'm after

[deft fiber]

There's nobody out on the internet who has that kind of knowledge to share, I'd expect
Save for Unity's developers who have different priorities
We can really only hope that when "block shaders" roll around they will give us that kind of granular control over the URP shader features

[merry abyss]

RIP, good to know. The unity github code repo has uncommented versions of stuff like shadows.hlsl, but without knowledge that I lack, I am not sure how to make use of them to fix my problem 🤔

[spring marlin]

Apologies if this is an overdone question, but it's been bothering me ever since I started making games years ago, and I still don't understand why it happens:

What causes the obscene differences in shading between these walls? Why doesn't the light uniformly shade them like you'd expect?

[fringe plume]

hey uhm, if i load a new scene in editor play mode the enviromental lighting from the skybox is not working anymore in that scene (not in the scene i pressed play in) and after build the first scene is having this issue bot not scenes loaded, very weird, help

[hearty shoal]

I need help, every time I bake my light my map becomes dark, does anyone know how to fix this issue?

[deft fiber]

Looks like a problem with normal maps, such as the texture not being marked as type: normal map

[deft fiber]

Could be many reasons for it so hard to say
I'd try to confirm that you're baking correctly and there's no issue with your scene or its meshes by first making a new scene with some default cubes and trying to bake lightmaps just for them

[deft fiber]

You need to generate lighting from the lighting window for each scene (with realtime and baked global illumination setting disabled if you don't specifically need them)

[fringe plume]

i have, but this still happens

[hearty shoal]

yeah, I made a small map and it was baked correctly, there must be something wrong with my actual scene with baking.

[barren sigil]

I NEED FAST HELP, NEED TO PRESENT THE PROJECT IN 2h

What can i do to fix this problem bigtime fast

i am seeing your answers in 30 min, please be very specific and easy to understand

Please help me

[timber lichen]

I'm very sorry If I'm asking something that is so obvious, but I truly don't understand how URP Light 2D's target sorting layer works.

My goal: I want it so that the light does not bleed through objects as if the light is being placed on top of all of the layers.

Pic #1

The target sorting layer for the light 2d component is set to "default" and for some reason this is the only way the light will render, but the light bleeds; as if the light is rendered on top all of the other game objects.

Pic #2

The target sorting layer for the light 2d component is set to "background". But the light now does not render. My expectation is the light will appear only on the background layer.

Please tell me if I'm doing something wrong, it would be very appreciated!

[barren sigil]

@timber lichen you got a Solution for mine maby?

[timber lichen]

Sorry bro, I'm new to 2D lighting and never touched unity 3D before. I hope you find a solution though

[barren sigil]

Im fucked

[timber lichen]

I accidentally find a solution to this, using the sorting group component

[chilly kettle]

Do you have checked "generate lightmal uv" in the import settings?

[runic ermine]

where is my directionality map?

[chilly kettle]

In the same folder as your lightmaps

[runic ermine]

found it thanks

[runic ermine]

why my light probe grayed?

this one

[chilly kettle]

Is it set to static or did you bake this mesh before?

[runic ermine]

yes it's static and it's baked mesh

[chilly kettle]

Well, then it receives its light from the bake.
Just turn it back to Receive GI: Lightmap

If you dont want that, you have to delete its Lightmapped Data and then it can get its lighting info from Lightprobes again

[runic ermine]

ah... so it's grayed out because it's already baked, I see thanks I did it now

[chilly kettle]

Good 🙂

[gentle sluice]

guys how do you deal with lighting? i try to put in a light but unless i ramp up the intensity it is dark, but if i ramp up the intensity then anything close enough to the light is a white blob

https://cdn.discordapp.com/attachments/497872424281440267/1131583386474008636/image.png

[chilly kettle]

You cant use lights in unity, as you see them in reallife. Normally you dont add a light source directly beneath the ceiling.
If you have a overall brightness in your scene, you work with global environment light.. so you make sure, everything has enough light.
If you want to bake lights, then you can add a area light to your room...

If you want your room to be lit, i would use environment lighting, add a lamp on the ceiling, fake the "light" with an emission and add an area light to the room (if you bake) or a point light in the center of the room, if you want realtime light.

[gentle sluice]

but that wont make accurate shadows

if i just place it whereever

[chilly kettle]

Well.. gamedesign is about faking stuff allover 😄

Do you bake your light or is it realtime?

[gentle sluice]

real time

stuff will move

it has to be point light

[chilly kettle]

for which hardware?

[gentle sluice]

phones

[chilly kettle]

Well. Phones can not really handle realtime shadows

[gentle sluice]

ive seen real time shadows on phones

[chilly kettle]

Mostly they are faked

And Point lights are the most expensive

https://developer.android.com/games/optimize/lighting-for-mobile-games-with-unity

Just my 2 cents: step back from doing perfect lighting on a mobile device.
Bake as much as possible and for the rest, fake the light or if you want, give very important objects a real realtime shadow.

[night shell]

^

its all about faking it till you make it in terms of graphics 😛

granted, skull isn't entirely wrong there are some phones that are capable of casting realtime shadows

[grand zealot]

I bet, I had my final due and waited till the last minute to do lighting. Overall the project looked nice but definitely isn’t industry standard.

[fringe plume]

is it normal for baked lighting to take hours for such a simple scene?

[royal mantle]

I know what to do for rooms, but how am I supposed to place reflection probes in wide open spaces?

[deft fiber]

Doesn't seem right
I'd try baking manually with Auto Generate off, and without any custom shaders in the scene

Or a test bake in a totally default scene with some cubes to rule out custom shader problems

[azure wyvern]

I'm having similar issues

Is light baking just simply broken? I've been using the progressive GPU lightmapper and when I open task manager, CPU is at 100% and GPU is at like 2-3%

[deft fiber]

What Unity version and do you have any messages in console about falling back from GPU to CPU baking?

[azure wyvern]

Thanks for the quick reply. I'll have to check when I get home tonight unfortunately.

Just another quick one. Do you know if it's possible to force stop or cancel a light bake, then save the previews? I've noticed that it seems to bake everything perfectly to 99%, then it just hangs or crashes. The result is usually almost perfect. However, when I hit play, the lightmap previews are all wiped, so I can't preview it in-game!

[deft fiber]

Not an option, to my knowledge
Hanging at 99% is a typical symptom of the lightmapper trying to bake animated shaders
I think it causes it to try to repeat the bake for it forever as the shader keeps changing

[fringe plume]

You see the scene, very simple, just some cubes

[deft fiber]

Relatively, but I can see custom meshes and potentially custom shaders
In your situation I'd want to 100% confirm that baked lightmapping works in your project, which can be best done in a new scene with only default cubes

If it works there that confirms the problem is somewhere in the earlier scene or its assets

[fringe plume]

I disabled global illumination on the tree so yeah

Gotta try in a new scene tho

[azure wyvern]

Ooooh, so it could be a product of some of my custom shadergraph materials?

I'll try just using URP lit materials when I get home

[gentle sluice]

im stuck gusy

guys

[gentle sluice]

nevermind that

shadows are bleeding through surfaces

as if its ignoring the static objects

[chilly kettle]

You have a culling mask there, are the walls on a different layer ,so they cant receive the light?

[gentle sluice]

walls are on Solid layer

they shuld be counted

this happens when i switched to Mixed

[chilly kettle]

Which Lighting Mode do you use?

[gentle sluice]

subtractive

[chilly kettle]

Maybe try Shadowmask for this. Not sure but i think in Subtractive your dynamic objects receive light from your light source.

Or change the color strenght of the light source, so your shadows are not that obvious.

[gentle sluice]

shadowmask fixed it

another question

colored objects are not static and they seem out of place

if i set the main light to baked, they are just dark, not lighted

[chilly kettle]

You have Light Probes?

[gentle sluice]

one

in the center

[chilly kettle]

one?

lol

[gentle sluice]

its a game for mobile

[chilly kettle]

light probes have no impact on the performance

you can have hundreds

[gentle sluice]

ok how does that matter? theyr just for reflection

[chilly kettle]

LIGHT probes. Not Reflection Probes

[gentle sluice]

oh

i dont have a light probe

[chilly kettle]

Without light probes, your dynamic objects cant receive baked light

https://www.youtube.com/watch?v=hMnetI4-dNY&t=1s
At 43:00 min

[gentle sluice]

now it looks accurate

[chilly kettle]

👍🏻

[gentle sluice]

shuld i have reflection probe fora mobile game?

[chilly kettle]

If you have Glossy/metallic Materials yes. And it doesnt need any performance, if you set the ref.probe to baked

[gentle sluice]

ok

[chilly kettle]

If you have multiple rooms, you want to have one Reflection Probe for every room.

[gentle sluice]

ok

thanks

[chilly kettle]

No Problem 🙂

[vagrant anchor]

What are cast shadow decals?

I was reading an article by playdead and found it there

[gentle sluice]

guys, look at this shadows from the building

compared to the purple vase

how can i fix this

its baked lighting

the green floor is very big, maybe the texture is stretched?

[gentle sluice]

guys

so i made an enclosed space

as you can see the walls are all black

but the floor is not

space is enclosed from all sides

how to achive pitch black spaces

the shadow

[night shell]

Seems to me like you are not a fan of the bounce lighting

What your seeing there is bounced lighting filling in those shadows @gentle sluice

[gentle sluice]

hmm

you mean to rise the bounces?

[night shell]

What are you trying to do

Bake without any bounce light?

Gonna assume so, in that case in the unity lighting window there is a field called indirect intensity multiplier

[novel tulip]

I'm doing some chunking for this world I'm generating and the lighting between the chunks seems to be inconsistent, generating a grid pattern. The chunks themselves are completely seamless, but the shading seems off. I'm using a standard lit hdrp material

[night shell]

Drop it to zero

[gentle sluice]

i dont know dude

i havent done lighting atall til now

but im thinking an entirely closed space shuld be pitch black

[night shell]

I just told you how to eliminate the bounce lighting

Turn your indirect multiplier to zero on the lighting window @gentle sluice

[gentle sluice]

ok but that makes the shadows black and unnatural

@night shell

[night shell]

So you want to keep the bounce lighting then

[gentle sluice]

yes

[night shell]

Ah right it’s reflections

That’s why

[gentle sluice]

in a closed space

why wuld reflections matter

[night shell]

Because reflections are not raytraced and are hacky cubemaps

Your floor is getting reflections from either the sky or some reflection probe within your scene, and your black walls are also having some kind of reflection as well

Controlling reflections can either be done my eliminating them, or placing reflection probes to get a more accurate reflection

Your material properties also affect the appearance of reflections on materials as well, if they are metallic or smooth/shiny they will receive a reflection

[gentle sluice]

so i shuld place a reflection probe inside the closed space

[night shell]

yes

[chrome compass]

Hi I have a problem that the light penetrates the walls, knowing that the wall I use is thick
What is the solution to the problem?

This room has no light, but the light comes from the next room

[deft fiber]

Realtime shadows for the light
Or non-realtime shadows with the baked lightmapping workflow

[deft fiber]

Your shadow strength is below 1, so some light is let through

[chrome compass]

Yes, when I made it 1, it did not penetrate, but the shadow became like this

It became severe and it's not very good

[iron dome]

Fixed...
Hey guys. I'm not new to baking lighting and I think I am experiencing a bug.
I have a fresh scene and am trying to bake a directional light. It bakes black. The point lights bake fine and are set to bake. Only the directional light is the issue. Any ideas?
The mesh and lights are all static.
First image is after baking. You can see the point lights have baked fine inside the building interiors.
Second image is after clearing baked data - so no baked data.

nvm. I fixed it. There was a skybox object which had a mesh render set to cast shadows.

[gritty fox]

I was using shadowmask to bake a scene before. 151 mixed point lights, indoor scene no sky box or anything. HDRP

Now it just crashes. It finishes everything, goes to importing assets and then unity just crashes at the end. I tried baked indirect but on a few surfaces the lighting was a bit off and the performance wasn't very good compared to what I had with shadowmask.
Ive tried 3 times now, each time taking like 3-4 hours to bake, finish up and then crash. So now i feel like breaking something lol please help.

[iron dome]

do you clear the baked data before you bake?

@gritty fox

[midnight sorrel]

I have this scene and I have this lighting settings. On my scene exist two sources of light: Probe Volume (2023 new feature) and sun which is Realtime.
The problem is that Baking requires more than **100GB **of RAM! And I dunno why!

How can I fix this?
What params should be tweaked for to get ability to bake the scene?

Okay, the problem is in probe volumes, why this takes 100GB RAM - mistery.

[gritty fox]

Yes

Restarted, cleared bake data, changed settings etc

Crash

[iron dome]

Have you tried reducing the values like texture size etc?

[heady stag]

i've added URP and followed some basic tut (https://www.youtube.com/watch?v=NOv31HSqs6U)
However my spotlights do not work, no matter what intensity i choose. Only directional light works

[deft fiber]

This tutorial is not for URP, but that only implies that the post processing shown is not compatible
Do point or spot lights not work in either realtime or after baking?

Realtime punctual lights need to be enabled in URP Asset's quality settings

[heady stag]

i dont see punctual lights anywhere

[deft fiber]

Point and spot lights are both "punctual lights" as well as "additional lights" in this context, though I forgot the inspector doesn't always call them that

[heady stag]

okey it actually did work, it just had to be at a very precise distance and a very high intensity (500)

if i move the spotlight up just a little bit, even while increasing intensity to 2000, its almost immediately gone

[deft fiber]

That seems way higher than what we should expect

[deft fiber]

That happens because the yellow curve is the outer range of the light which fades out the light

[heady stag]

aah, i see now, the range slider

[deft fiber]

What is the range set to currently? It may be that your scene's scale is wrong

Light intensity is relative to scene size in editor units, which are meters

It's worth making sure that your humanoid character is about two units or two default cubes high, and not bigger or smaller by a big factor

Sometimes meshes are imported even 100 times too large which makes it seem that lighting and physics act weirdly relative to them

[heady stag]

16, my unit is scale 1 & 1.25 so i think its fine. But i can control the light way better now with range etc. Intensity is still 500 but i can control it just fine

[deft fiber]

It seems correct!

[gritty fox]

no

what about shadowmap and things

should i disable them when baking or doesnt matter?

[iron dome]

Well if you want shadows in the bake you should probably leave them on. How about reducing the texture size down to something very small like 64x64 and then reducing the other values by half or more

[gritty fox]

alright

[lapis lion]

Set the lightmap resolution to 1, lower the 3 samples to as low as possible and set max bounce to 1. Set directional mode to non-directional and Increase the max lightmap size to 2048 or 4096 and try again see if it finishes.

You are generating a lot of high res lighting to a ton of small lightmap textures is what I am thinking.

The settings I describe should hopefully allow the lighting process to finish. Als make sure you are not editing a prefab while baking lights, be in the scene root.

[timber lichen]

Im making a 2d topdown game (with shadows). But the problem is my door is casting shadows onto my walls which i dont want. I only want the door to cast shadows on everything else except the walls. How do i make this happen?

[timber lichen]

also how can i make some light only impact some objects?

[deft fiber]

2D lights have a "target sorting layers" option

[timber lichen]

it dont work for me

[gritty fox]

Thank you will try this when I get home

[timber lichen]

ive set the walls and floors to different sorting layers in the tilemap renderer, but when i set my global light to target anything else than default it doesnt light anything at all

[gritty fox]

yeah works now

only thing i dont understand is why ive had to lower the settings when theyve always been fine as they are

upped it a bit and got it to work on these settings

havent tried going higher yet

[runic ermine]

anyone here know any guide that tell you how to make your own shadow caster?

like writting it from scratch

[lapis lion]

On some unity versions the lightmapper gets crashy or weird. Could be that you were unlucky. Restarting unity or your pc usually is enough. But if you can get back to your old lighting settings it rules out hardware related issue. Good luck with your project!

[runic ermine]

ok so I found something that can tell me how to make shadow caster

but this shadow caster is so dependant on camera location

like for example

it broke because the shadow caster (camera) is not in the right position

so it like need to be on such exact position, unity directional light don't need thing like this

anyone know how to solve this problem?

[gloomy ember]

anyone knows why my light isnt showing? (hdrp)

[charred moth]

Im getting very weird artifacts on some of the walls, I have tried everything like replacing them, enabling double sided GI and other stuff, but nothing seems to fix it.

[deft fiber]

Check UV overlap and Texel Validity view modes from the scene window

They would help us pinpoint if the problem is one of them or both

[charred moth]

changed it up a bit, still running in the same issue and heres the texture validity view

nothing on the UV overlap view

[deft fiber]

Hmm is it a probuilder mesh

The blocky artifacts are texel invalidity from exposed backfaces
https://forum.unity.com/threads/faq-blocky-artifacts-appear-when-i-bake-a-scene-how-can-i-fix-them.951444/

UV overlap could cause them to be appear in wrong places away from the exposed backfaces, but the view above indicates that should not be the case

The only exception that comes to mind is that the UV overlap view might not work correctly for probuilder meshes

[charred moth]

well how would i fix it?

[deft fiber]

Find the backfaces and remove them by covering them with something or setting those specific materials as two-sided

The tricky part is to find them if they don't seem obvious

[charred moth]

finally it wokrs

[errant tangle]

i have an asset that usually has transparent windows, for whatever reason in another project they are blacked out?
what are some possible causes please?

okay i know why, i switched from using the built in render pipeline to the urp and that caused the black windows

[runic ermine]

anyone?

[deft fiber]

No need to crosspost

[deft fiber]

People who are familiar with re-writing URP's rendering features (or have as much as attempted it) are few and far between

[lapis lion]

presumably you need set the realtime light settings/shadow cascade settings in the pipeline asset especially the realtime shadow render distance away from the camera

[lapis lion]

I don't use hdrp, but inner cone angle at 0 might be a bad idea for some pipelines, probably bad if you use light cookies.

[gloomy ember]

still doesnt work when i increased the inner angle

[novel merlin]

Hello guys, I have an issue
I am working on an indoor garage scene where I have directional light turned off, and want light to be emitted from the ceiling (the ceiling material has an emission map)
But however, it does not seem to be casting any light onto the floor. I'm not sure how I would achieve the effect of the ceiling lights casting light onto the floor.
I tried changing the emission map intensity, but it just made it look worse. At this point, I don't even know if I should be using emission maps for this effect. Maybe spot lights are the fix to this? But is there an easier way of doing all that without having to place hundreds of spot lights?
Please help, and thanks in advance

[deft fiber]

Short answer: no

[chilly kettle]

Emission is not working that way.
Emission has mostly a very small effect only on direct surrounding objects.
You can work with area lights to fill the indoor scene with light and add a post processing effect (bloom) to make it look, like your visible lights in the ceiling are "bright".
If you want something like a visible light on the ground, you could use a spot light.

[novel merlin]

Oh okay! I guess I mixed up how emission works.
Thank you

[chilly kettle]

If you place a massive cube in there with an emission, you would see the effect. But not with this small points there ^^

[novel merlin]

Okay, I think I got it, but does this look like light the square ceiling tile lights would emit in real life?

[chilly kettle]

Not really ^^
I think in reallife you will not see this on the ground ^^
You can try Arealights and bake them

[deft fiber]

You can technically get light cast from emissive materials using baked lighting, but you'll still want light components there because emissive baking is so inefficient

[deft fiber]

These types of lamps have light diffusion panels, which makes their light very wide and soft
Area lights would be the most fitting light component for them, but spot lights with extremely wide and soft angle could work also (with no shadows

[novel merlin]

Yeah, I changed it all to area lights, but the baking process on URP is very long for a simple 2 room map (it takes around 20 minutes). Is this normal?

[chilly kettle]

Depends completly on your settings ^^

[deft fiber]

Baking can be sped up by baking on the GPU (if you have a decent one) and by decreasing resolution

[novel merlin]

Ohh my bad lol I had it set to my cpu which is a 9th gen I5,
I have a 3070 so it should be faster with my gpu

[native pewter]

Does anyone know what this issue is called and how to troubleshoot it?

Basically I'm trying to make modular assets for this level, the issue here is that there are two types of ceilings here. I don't mind the seam in the middle that separates the two meshes however the light is also being distorted. The UV's are as good as they're going to get and they're both using the exact same textures with the same.
I believe it has something to do with the bake but I'm not sure

Different angle. It's obvious that it's caused due to the rotation of the mesh but how would I go about to fix this?

[thorny goblet]

I've been really against baking, but i did a small amount of baking, and it actually works pretty well, here is the only problem though: https://i.imgur.com/Uka3ZCk.png where could this be coming from?

The blocks of light on the floor

[chilly kettle]

Hm.. i have some guesses:

• No "Generate Lightmap UV" in the import settings
• Something weird about your normals
• Very low Resolution of the lightmap or your different tiles there

[chilly kettle]

Probably also no "Generatve Lightmap UV" in t he import settings or very low Resolution?
They should look like this when you activate this debug mode

[thorny goblet]

Where exactly is this?

[chilly kettle]

What? I gave you 3! options

[native pewter]

Thanks for the direction, one more question if you don't mind.
My work flow is like this

1. Model and UV asset in Maya(Low and high poly)
2. Bake high to low and little basic texturing in Substance Painter
3. Import texture and mesh into Unity and apply to material

My question is, at which point would the Generate Lightmap UV and/or Low resolution of the lightmap occur, so I can go back and sort it?

Sorry if this is too broad of a question, just been struggling on this for a while now

[chilly kettle]

For example, if you stack UVs for saving space in your texturing process, you get problems when baking light.
Generate Lightmap UV is in most cases a very good idea, because unity packs the lightmap UVs very efficent and in the style how it needs them.

For the Resolution, you could do first bakes with something like 5 texels per unit. For final bakes you should increase it if needed to something like 20 tpu or more, if you need really high res.

I always to the Generate Lightmap UV.
If you have really complex shapes, then you can do your own lightmap UV in a seperat UV-Channel as your Texture

[deft fiber]

Just a nitpick but these dark grey checkers would imply that the viewmode has no lightmap debug data to use, as it's only stored for the session after bake, per scene ^^

[chilly kettle]

Yeah, it has no lightmap ^^

But i guess they have fixed it or gave up 😄

[deft fiber]

Perhaps!
I appreciate you here

[deft fiber]

Tiled and modular environments with small pieces are always more or less problematic for light baking, since more disconnected parts means more seams, which means discontinuities in the surface lightmap, and more UV islands that require padding which consumes lightmap resolution

https://forum.unity.com/threads/lightmapping-troubleshooting-guide.1340936/ chapter 10 has more info about this

You can also find the rest of the issues there that we've been talking about

[chilly kettle]

Btw Spazi? How long do you use Unity? You seem to have a plan from everything 😄
I mean im using it for 5 years now, and i still struggle on some parts 😄

[deft fiber]

I started in spring 2020, but I've been focusing more on problem solving than the development grind itself during that time so I've had more time to learn various things!

[chilly kettle]

Ah 😄 Okay ^^
Yeah solving problems from other people increases the own knowledge very fast 😄

[deft fiber]

Truly, when you work alone a hunch of how stuff works is often well and good enough

[thorny goblet]

Okay, i baked my scene, and its getting alot more fps, but a problem, is that my floor texture turns black when looked at, and turns back normal when not.

It depends on what angle i look from

[chilly kettle]

That sounds like a normal problem.
Do your Material have a normal map?

[thorny goblet]

Yes, but i mean pitch black, as if the floor isnt there

[chilly kettle]

Yeah.. but you said its dependent on the angle, and that is normally a problem with normals
Is the normal texture set to type "normal map" in its import settings?

[chilly kettle]

Is this on every floor tile?

[thorny goblet]

Its just one big floor.

[thorny goblet]

Yes it is

[chilly kettle]

Can you do a video? 😄

[thorny goblet]

I wouldnt be able to upload it, because of size, but here are screenshots: https://i.imgur.com/tkQYuXU.png https://i.imgur.com/cZX5Uxr.png

First one is when looking directly at the floor

[chilly kettle]

how does it look when you change the import settings of the mesh to this?

just to make sure, its not a smoothing problem

[thorny goblet]

nvm i found the problem its my occlusion culling

[chilly kettle]

oh lol

[thorny goblet]

Sorry, but one other question, why does it seem like there is a radius around my characters body. https://i.imgur.com/uvKwtW6.jpeg

Its not very noticeable in this dark environment, but in lighter areas it is.

anything in the radius, becomes slightly darker

[potent shell]

Hi, I'm making game and there's this problem with the lighting and I don't know what's causing this problem
I'm using point lights with the Baked mode turned on.

[lapis lion]

Baked lights are static, you don't move them

[charred talon]

How can I move down skybox?

[runic ermine]

So, I'm trying to make toon shading, but the baked shadow give me this gradient like shadow, is there a away to not include them in the lightmap?

like I only want to bake the casted shadow

[chilly kettle]

YOu can move up your Terrain. Or create your own skybox that fits your needs

[chilly kettle]

What is "them" ? 😄

[runic ermine]

the one I circle in red, the one with gradient like coloring on the lightmap. Like I want to remove that and get just the casted shadow

[chilly kettle]

Where is the light coming from?

[runic ermine]

there is 2 source there one is the directional light (white color). the other one is from an emissive object which is the red light

[deft fiber]

You can disable bounce lighting from lightmapping settings

But the direct shadows will always have smooth edges to some degree, or pixelated

[runic ermine]

yeah it's better now thanks. but the direct shadow is indeed still there

[chilly kettle]

YOu can turn of cast shadow on the object 😄

But i guess you want some kind of shadow?

[runic ermine]

yeah like I just want to bake the casted shadow, since the direct shadow that unity bake is not toon like shadow

[chilly kettle]

If nothing gives the correct visuals. Paint it in with photoshop 😄

[runic ermine]

hmm... i might do that for last resort 😅

oh... wait this actually help in decreasing the gradient, is there a way to apply this?

[chilly kettle]

Whats this? The Intesity Slider in the Lightmap Preview?

[runic ermine]

from that

[runic ermine]

maybe yeah

[chilly kettle]

I dont think that you can apply this. Never done that.

[runic ermine]

I see... I will look for another way, thanks anyway

[lapis lion]

Have you tried disabling global illumination

[deft fiber]

That only previews the lightmap at different exposure values, it doesn't actually do anything to the gradients

Try disabling bounce lighting when baking as I suggested

this setting

[runic ermine]

the direct light is still there

I mean the gradient of the direct light

[deft fiber]

Isn't that exactly what you wanted?

Where is the gradient in the scene

[runic ermine]

it fix one of the problem of the gradient of the emissive light, but the gradient from the direct light is still there

[runic ermine]

like on the top left

[deft fiber]

Can you show that in the scene

The lightmap can have all kinds of weird values in UV areas that are not visible from the outside

[runic ermine]

like that?

[deft fiber]

Well, since the lightmapper doesn't have any toon shader, the light received by a surface is proportional to its normal direction relative to light

It's a "gradient" because this surface is curved

You can modify lightmaps in an image editor that's capable of editing .exr files to apply a step function for a toon-like light ramp

Or you can use a shadows-only mesh for baking and a dynamic mesh with a toon shader for the visuals

In either case it's unlikely you'll ever get good looking toon shading from the lightmapper because you'll always be limited by texel resolution

[runic ermine]

I see... thanks

[deft fiber]

But it should be fairly easy to try those two ideas

[oblique crown]

is there a way to easily compare scenes with APV and with no APV without clearing baked data? I would like to see how it affects environment and characters

[deft fiber]

If there doesn't seem to be a button to toggle them on/off, I suppose you could save the scene as or duplicate it and clear the bake, then compare the two

[oblique crown]

that's why I asked about an "easy" way. This seems so daunting I don't think anyone would bother

[deft fiber]

What seems daunting?

[oblique crown]

having the duplicate of the scene without the baked data

[deft fiber]

Isn't that just a matter of a few mouseclicks

[oblique crown]

depends on how many scenes you have in your project and how complex they are. Of course this is a workaround, but system such as APV shouldn't require us to work this way

[woven oxide]

Not exactly sure where to post this, but does anyone know what this issue is called? Where some of the triangles are darkened

[deft fiber]

@oblique crown Did you try disabling the probe volume gameobject, or the probe volume global setting in Frame Settings

[oblique crown]

I didn't tried frame settings. I'll check that one out, thanks

I am wondering how it will affect scene view camera 🙂

hm, it might actually works as I can see that changing default frame settings works on other properties. (I have to switch branches to check the apv)

[deft fiber]

Do you have a better picture, it's a quite hard to see

[woven oxide]

I mean the grey parts, not sure why they are grey

Something odd is happening with the triangles and for them to act like this with the lighting

[deft fiber]

Could be inverted normals, could be n-gons or self-intersecting polygons, could be overlapping geometry
I would scrutinize those polygons in modeling software first

[woven oxide]

It may be overlapping geometry, vertices. Generating this mesh in Unity. Thank you, I'll check it out!

[deft fiber]

How was it generated?

[woven oxide]

It is a bit complex, it's basically a cylinder with cutouts

Calculating triangles/quads

It's happening throughout the whole model, but on the outside it's hiding it

Also doesn't seem like it has extra triangles, it's an odd one. I may just add a plate on the areas without holes and hide it, dumb solution but works

[chilly kettle]

Outch! That are WAY to many triangles for a game 😮

[chilly kettle]

They are also to sharp and to long.

[deft fiber]

I expect your mesh generation algorithm is making some kind of mess there
Booleans are notoriously difficult to get right without glitching out

These look like overlapping or intersecting polygons also, but it's hard to say

[woven oxide]

Quite likely hahaha not a pro at this and its quite complex for me. Need time to debug it all

[main wolf]

if you are using Built-In, I think you can manually sample the lightmap using DecodeLightmap then use step function to make it cell-shaded

[deft fiber]

Shader Graph also has the Baked GI node

[main wolf]

I think that could work too, sample the baked GI/lightmap then step it to make it cell shaded

[deft fiber]

The challenge is that doing any kind of stepping function to lightmaps brings out the texel edges, resulting in worbly light ramps

[runic ermine]

I see... thanks i will look into that

[cunning quail]

Guys Why can't I darken the sprites even though there is no light? How can I add 2D lightning ?

[unique dune]

Anyone has any idea why my shader and my lights look different in the game window and the scene window? I'm at a loss what caused this. Thanks in advance 🙂

[woven oxide]

May be the lighting

[unique dune]

I've added a screenshot of my direct light and lighting settings, but I can't see the issue

[woven oxide]

Not really sure, but it may be an HDR issue. Do you have HDR enabled?

If you click on the camera

Or this: In the scene tab, you have to check the little sun ☼ next to the "Shaded" drop down so as to see the real lightning of your scene.

[deft fiber]

Does your camera have post processing? I'd also check if changing the scene view from orthographic to perspective changes the appearance of the shaders

[deft fiber]

You have to create at least one 2D light into the scene, or lit sprites will be fully illuminated

[thorny goblet]

I have some static gameobjects (Chairs, desks) that for some reason, stop reacting to light after baking my scene, before baking it looks just fine.

[deft fiber]

Baked objects don't really "react" to light
Can you demonstrate the issue

[thorny goblet]

gimme a sec to bake my scene once again, to provide a example

[thorny goblet]

This is what it looks like after baking: https://i.imgur.com/TyYni3h.png The chair and desk, are pitch black, even though their is a light directly above it.

[deft fiber]

After baking check scene view modes for lightmap UV overlap and texel validity

[thorny goblet]

How do i do that?

[deft fiber]

https://docs.unity3d.com/Manual/GIVis.html

You must have baked lights for that scene during that editor session to use them

But it will likely reveal UV overlaps, texel invalidity or both

[timber lichen]

how do I darken an area? (like negative light)

[chilly kettle]

When you dont use a light 😄
Or possibly with Post processing

[timber lichen]

but the area is already lit

by the sunlight

even though it's underground

(the light on the side is black because I thought you could have negative intensity

[deft fiber]

You would have a shadow casting surface above the underground area to block the directional light, assuming directional light is reaching in
It will still be lit by ambient lighting

[thorny goblet]

How do i fix overlapping UV's?

[deft fiber]

https://docs.unity3d.com/Manual/ProgressiveLightmapper-UVOverlap.html

Most important step is to have lightmap UVs on the meshes, which can be automatically generated from mesh import settings

[timber lichen]

I already have a water plane blocking the light

I'm not sure why it's still getting light

[deft fiber]

Ambient lighting from the sky / environment

[timber lichen]

how do I turn it off for closed areas like that one

[chilly kettle]

With a script for example

[timber lichen]

how

[chilly kettle]

If its a first person game, you could add a collider there, that triggers a script to turn of or darken the ambient light of the scene.

[deft fiber]

Which render pipeline is your project using?

[timber lichen]

urp

[deft fiber]

Then you may have to use baked lighting and its reflection probes and lighting probes, or control all ambient lighting with a script as suggested

(There's no technical reason why we couldn't use lighting probes without baking all lighting, like reflection probes can, but there's no editor tools for it)

[chilly kettle]

I think using a post processing for this area could be possible too

But that would make everything darker in this area, not only the walls.

[deft fiber]

I don't think it's really possible to reduce lighting with post processing
Reducing exposure or brightness otherwise won't be convincing
HDRP does have volume overrides that can control ambient lighting though

[eternal vapor]

Hello everyone !! I am a newb VR developer using Unity. I need your help for me to know why there are some patches of glow after i generated baked lightmaps. Thanks!

[deft fiber]

I would first check scene view modes for lightmap UV overlap and texel validity

I can see realtime/mixed lighting but no visible results of baking

[eternal vapor]

Thank you,

[deft fiber]

The red texel invalidity means those surfaces are exposed to mesh backfaces, which terminate light rays during baking
That little UV overlap shouldn't cause any big issues
I'm a little suspicious about how the floor doesn't seem to be included in the bake, but the foliage is

Usually you don't want plants, foliage or other such high-detail meshes to be lit by lightmaps, but light probes

The texel invalidity looks so noisy I guess there might be overlapping geometry there too, but most of it would likely be caused by inverted normals

[lapis lion]

You have to box in your geometry by shadow casters so that no light gets in from the skybox. No post processing or script required.

[deft fiber]

Skybox lighting is not calculated in realtime, it can only be shadowed by meshes when baking lighting

[lapis lion]

Yes you are right, it's true for real time but he did not specify what he is using or I missed it 😉

I dont remember by heart is realtime directional goes through back faces, probably does. So boxing in makes sense then

[eternal vapor]

thank you. there are a lot of things im not able to wrap my head around. are there any specific guides i can go though?

hat/tip

[thorny goblet]

What is the best route i should take when it comes to lighting ? realtime gives me bad performance and Baked, gives me year long wait times. I never though that lighting would be the death of me.

[mellow sierra]

#💻┃unity-talk message

[thorny goblet]

I understand i only have two options, but i'm asking about what i could possibly do to make realtime lighting more bearable.

[mellow sierra]

Use less, lower the quality of everything

[thorny goblet]

I'm trying to target low end systems with my game, so that kinda forces me to also bake with my low end GPU, instead of my better one.

[mellow sierra]

Same answer to that for speeding up baking

[deft fiber]

Bake on the GPU, decrease samples and most importantly lightmap resolution, exclude small and detailed meshes from the bake, and make sure you don't have other stuff in the scene that could cause ballooning bake times such as animated shaders

[deft fiber]

Not how it works
Baked lighting performance for the user is precisely the same no matter how beefy the machine you use for baking is

[thorny goblet]

Sadly the low end gpu i'm using to build this game, always force unity to fall back to my CPU

[deft fiber]

You should use the better GPU

[thorny goblet]

Okay

[deft fiber]

Newer Unity versions also support weaker GPUs for baking

[lapis lion]

I challenge you spazi! Lightmap resolution is not much of a factor because it does reduce the number of raycasts 😉

[deft fiber]

Here's the introduction guide https://youtu.be/KJ4fl-KBDR8
Here's the troubleshooting guide https://forum.unity.com/threads/lightmapping-troubleshooting-guide.1340936/
I'm not sure where there's resources for best practices like when to exclude things from bake, when to use probes instead of lightmaps or how to allocate lightmap resolution but I guess those can be learned by practice as well as by scouring though the docs, for forum posts and for more guides

[lapis lion]

Does not*

[deft fiber]

I believe it does! From my understanding the raycasts are fired out from each texel
Docs also state that:

Lightmap Resolution: Specifies the number of texels per unit to use for lightmaps. Increasing this value improves lightmap quality, but also increases bake times. Note that doubling this value causes the number of texels to quadruple because it determines both the height and width of the lightmap. See the Occupied texels count in the statistics area of the Lighting window.

And it certainly feels like it does, more so than samples

[lapis lion]

Ah sorry I understood this as lightmap size, good point 🙂

[deft fiber]

For a long time I thought the size was the bake resolution, since it is one kind of resolution also!

[lapis lion]

I stand corrected!

[main wolf]

You can cut bake time significantly if you scale down the map and light ranges before baking and revert the scales after baking is done, but then you cant use light probes that way (or maybe you can now, I've never tried it)
On 1:1 scale, my map takes hours to bake, while on 1:10, it only takes a couple of minutes, on CPU, with the same parameters.
[Edit]
That's using enlighten btw, I'm not sure if it also works on progressive

[deft fiber]

This sounds like a roundabout way to decrease lightmapping resolution, which is relative to unit scale

[thorny goblet]

Okay thanks

[mortal swallow]

I'm having trouble with the light probe volumes. Following the instructions here:

https://docs.unity3d.com/Packages/com.unity.render-pipelines.high-definition@15.0/manual/probevolumes-fixissues.html
https://docs.unity3d.com/Packages/com.unity.render-pipelines.high-definition@15.0/manual/probevolumes-use.html

But however, I'm getting a lot of Light Leaks with mixed lightning, whereas with baked lightning mode it's not leaking. Is there some setting somewhere that I am missing to make mixed lightning used the same baked light settings? Should add I've already got the baked global illumination and baked indirect on (using unity 2023.1)

[main wolf]

🤔 Could be the case.

But iirc, I ve tried using the lowest lightmap resolution and it still takes more than 1 hour to bake on 1:1 scale

[deft fiber]

Can you show the two results you are getting?

[primal viper]

how can i fix the lightning in this door

(im in a dark room and theres a lighted room in the other side)
maybe an invisible cube or smth?

[chilly kettle]

Is this Realtime or baked?

i guess realtime?

[primal viper]

how do i check that

i light options i guess

realtime

ye

[chilly kettle]

Hm. If you didnt bake the light, its realtime ^^

Does your door have a second side, or is it just this side?

[primal viper]

Its both sided

this is the other side

[chilly kettle]

Is the door very thin at the parts where these six ornaments are inset into the door?

[primal viper]

let me check

[chilly kettle]

It may help to change the Lighting to "per pixel" if you dont have this right now

[primal viper]

I mean i think its not too thin

i made it less thin and its very buggy still

[chilly kettle]

Try set Lighting to "per pixel" in your Render Pipeline Settings

[deft fiber]

Assuming the light has shadow casting enabled, the door is likely too thin, and/or the front and back side of the door aren't geometrically separate enough

[primal viper]

where can i find that sry

[chilly kettle]

Are you on URP?

[primal viper]

idk lol

[deft fiber]

This stuff is easier if you start knowing

URP uses pixel lights by default, and both pixel and vertex lights are limited to max 8
BiRP uses vertex lights for any lights that go above the light limit

Vertex lighting can make shadowing less accurate which could explain the light leaking
I think it's likely that it's shadow bias pushing the light through thin geometry

I'd test with a shadows-only box collider to see if it's possible to thicken the door's shadow just a bit to allow one side to be lit but the other be shadowed

[mortal swallow]

Ok, I realised mixed lighting, meant all objects would still receive direct realtime lighting. I thought mixed lighting would be baked for static gameobjects.

[deft fiber]

So it's solved or?

Mixed mode lighting is baked as well, but has realtime parts for shadows and specular reflections

[mortal swallow]

Yes, my question is solved, but I'm confused over the baked lighting scenarios for light probe volumes. As the docs seem to imply I should be manually moving geometry/activating lights and then baking each individual light scenario. Seems an awful lot of work without some kind of scripting to help out

[deft fiber]

How do light scenarios relate to the original problem?

[mortal swallow]

Because I want to be able to turn on and off these baked lights, and I have a lot of these lights. There can be a lot of combinations of lights being on or off and some geometry can move. I was hoping to be able to use light probe volumes for my project, but it's looking less likely

[deft fiber]

I don't think either probes or lightmap really support those kinds of environments

[thorny goblet]

Umm what is a fix for this? https://i.imgur.com/T76PHbH.png

or atleast a cause

[deft fiber]

Both depend on what the problem is exactly

And what kind of lighting system you're using

[thorny goblet]

Progressive CPU https://i.imgur.com/1kVrxQi.png

[deft fiber]

Right, can you point to a specific problem? I don't know which one you mean

[thorny goblet]

The walls are all a different shade of gray, and certain parts of the scene is pitch black almost as if its not being rendered

Like the wall all the way at the back of the image

https://i.imgur.com/T76PHbH.png

[deft fiber]

Check lightmap UV overlap and texel validity using scene GI view modes
https://docs.unity3d.com/Manual/GIVis.html

They will likely reveal issues

[thorny goblet]

uhhhhhhh https://i.imgur.com/wPEcUTw.png

https://i.imgur.com/cgpkMBj.png

[deft fiber]

Dark grey means that you have not baked during this editor session for this scene so there is no debug data to display

The one above suggests that your meshes don't have proper lightmap UVs, though

[thorny goblet]

The walls are just Unity Cubes

[deft fiber]

The non-uniform scales are problematic for lightmap UV mapping

And the windows blinds (?) seem especially bad

With default cubes you get no control over their UV mapping in these situations

[thorny goblet]

oh ok

[deft fiber]

@thorny goblet also you should really use your good GPU for baking that you said you had

[neon pebble]

GPU hmm tasty

bakes muuch faster than CPU

a pitty i have one that does not let me bake

[deft fiber]

Like I mentioned before newer unity versions support weaker GPUs for baking
2023.2. as little as 2GB vram if I recall correctly

[neon pebble]

oh really? i have to install that version

mine has 2GB

thank you for this info

[thorny goblet]

Ok, i'll start using that

[deft fiber]

It's a tech stream release so keep backups of your projects

[wispy dome]

Not quite sure if this post goes here but, does anyone know why these lines are showing up in unity but not in blender and how to fix it? In blender it looks fine, but if I set the image texture to "linear" instead of "closest" in blender then I get the same result in blender as well. Is it possible that unity sets the texture to use "linear" instead of "closest" automatically? My texture that I am using is just a few pixels that range from black to white. Also the blender file and unity prefab are directly related aka when I open the prefab in unity it opens up blender so they are definitely using the same texture.

[deft fiber]

You need to disable the texture's bilinear filtering (to point / no filter) in texture import settings on unity side

Probably want to disable mip maps too

[chilly kettle]

@deft fiber Do you have an idea how i can achieve a material with transparency but also emission + bloom? Got my Chicken with emission, but i want it to look more like a "ghost" 😄

Maybe your faces on the wall have a "unlit" shader?

[deft fiber]

You can get emission and bloom just fine with transparent materials, though with alpha blending you may need to compensate brightness for transparency
Additive blending makes it easy to have glowy semitransparency, as it makes the texture act like light

This is vertex lighting
Either pixel lights are disabled in your quality settings, or you've hit the pixel light limit and the remaining lights are falling back to vertex lighting

[chilly kettle]

Premultiply works, additive does nothing.

[deft fiber]

The graphics quality settings are responsible for that

[wispy dome]

Thank you, that seems to have fixed the problem!

[deft fiber]

So, premultiply renders lighting and reflections on the whole surface regardless of alpha, like glass
Additive adds every pixel's color to what's behind it, so white is like bright light while black is invisible
Premultiply should be used only on Lit shaders while additive works best with Unlit

If you want a ghostly effect you may want to use some shader artistry as well, like fresnel effect for the emission, and probably some glowy particles to amplify the appearance of bloom

[chilly kettle]

yeah i was thinking about some particles too ^^
Looks fine with Premultiply now ^^

[thorny goblet]

Is it possible to use Mixed lighting, and exclude certain gameobejcts from baking and make them use realtime lighting?

[deft fiber]

Anything that's not "contribute GI static" will be excluded from bake and be lit only by realtime and mixed lights as well as light probes

[thorny goblet]

Okay thanks

[chilly kettle]

How big is your scene?

What means big? .. 😄
100 units? 1000 Unity?
Whats in there?
What are you Baking Settings?

Infos pls

😄

Are you baking with CPU (slow) or with GPU (fast) ?

[deft fiber]

It's not recommended to use Enlighten over the Progressive lightmapper

I can't give any insight about what the common problems or expected bake times are for Enlighten

Practice baking in small test scenes first
There's so many things to go wrong that you'll want to familiarize yourself with the process to avoid the pitfalls and save time doing so

[iron dome]

Spazi is an actual beast in this channel

[native pewter]

Hello, I'm back still stuck with the same issue. Same asset, just rotated 180°
I tried to generate Lightmap and and change the resolution and retexturing the model. I can't figure out what's causing the light alteration.

[gritty fox]

another lightmap question, am i meant to take the scale down or something? pretty sure i fixed the uv overlaps in blender but after baking it doesnt seem to be the case?

then it creates things like this

[native pewter]

[gritty fox]

[lapis lion]

Your lightmap uvs look like they overlap. Make sure your 2nd uv channel has unique uv space dedicated to every surface. Don't use unity's "generate lightmap uvs", creating lightmap UVs is a 1 minute job with automatic UV layout tools. Check the lightmap view in the scene tab and the uv overlap debug view from the same dropdown menu.

[lapis lion]

Interesting warning in your Inspector. Is that level merged into a single mesh? I dont think a single mesh can have more than 1 lightmap assigned but you will have to test. Your resolution is very high indeed at 22.

[gritty fox]

Only the ceiling is all together

Which is pretty big and uses 3 materials

[lapis lion]

It may explain the pixelated look, I dont see the lightmap resolution grid on your ceiling. Try cutting it up.

[chilly kettle]

I think your panels at the ceiling are overlapping (did you check this?) or they are very very tiny in your lightmap, so they only get like 1 pixel of light information.

[ancient atlas]

how to bake 2D sprite light in unity ??

[chilly kettle]

If you type in this 1:1 into Google, you get a ton of Information 😄

[ancient atlas]

ya got nothng

even went on yt

[chilly kettle]

Then provide us with more information and possibly some screenshots. That makes it easier to help

[ancient atlas]

its a 2d SPRITE LIGHT

GAME FOR MOBILE

so how t bake a 2d light

[chilly kettle]

I think URP doesn't officially support 2D light baking. Baking 2D lights is more of a complex process because you would have to bake the 2D light into your sprites, which Unity doesn't support as of now. (i think)

[ancient atlas]

should I draw the light in photoshop itself ?

[chilly kettle]

You could do this, yeah!

[ancient atlas]

ok htanks for help

and vbtw

what if the I keep it real time

as its a mobile game ?

[chilly kettle]

Sadly im not familiar with 2D.
Its depending in the amount of Lights.
You can easily deal with a few of them.

[ancient atlas]

oh ok

[chilly kettle]

i imagine you are not looking at 10 of them at a time? So they will be deactivated when you leave the screen where they are shown

[ancient atlas]

4 light in total only

sprite light

[chilly kettle]

That should not be a problem

[ancient atlas]

ok

thanks

[chilly kettle]

and if it will, you can just change it later on.
You could fake the light with another sprite that looks like the light and lay it above the other sprites for example. Or paint the light into your sprite like you already said.

[ancient atlas]

hm good idea

[deft fiber]

Did you try these
#archived-lighting message

[gritty fox]

Yes I did check and I fixed all of them so I think your right on them being too small

[gritty fox]

Will try this

[winter ivy]

I'm having trouble understanding APVs and just light probes in general. With a procedural world generation system something like this wouldn't be able to work because it is precomputed and requires baking right? but afaik, if you bake an apv beforehand and instantiate a prefab above it, would it not work?

if something like the above is not possible, what is the closest I can get to realtime dynamic gl? without using ssgl...

[deft fiber]

Baked probes pass their lighting information to dynamic objects within their range
That's not usually practical for entire procedural worlds though

[winter ivy]

is there a way you can instantiate lighting information, or just a way to bake during runtime?

Am I looking for something else or is this just not a thing u can do with unity atm

[deft fiber]

You can load in sets of pre-baked probes but otherwise no

[native pewter]

Thanks, I'll try this

[native pewter]

Yes I did

[deft fiber]

That doesn't really give any new info to work with
It still looks like a normals issue but rule out lightmap UV overlap first

[timber lichen]

Cool lighting trick

[edgy root]

Hey friends! I'm trying to bake my lightmaps using Unity's built-in tool. It works ok, but when I change "Texture Quality" in settings, no matter how high quality I go while baking, "Low" texture quality always results in really bad lightmap. Any way I can prevent texture quality settings affecting my lightmaps? Cheers!

[lapis lion]

You have it set to low by default in your "player" category in your project settings for your current build target.

[edgy root]

I'll check. Changing Texture Resolution in the in-game settings seems to make it look good, it's just when the setting is Low it does this weird compression thing. Would a combination of using Low URP (1/8th texture resolution) with Texture Quality (1/4th) produce this kind of result?

[lapis lion]

I'm not talking about global texture compression, but your lightmap texture compression specifically. your seems can be an artifact of mipmapping and lack of lightmap padding.

[edgy root]

Thank you. I don't know much about mipmapping, is it something I should disable?

[deft fiber]

Try increasing padding as Sjors suggested, and/or lightmap resolution and bake again, and also check that your mesh lightmap UV generation settings have a minimum lightmap resolution that's at least what you're baking at, and a minimum object scale that's at least as big as your object scale in scene

[edgy root]

trying now, thanks @deft fiber @lapis lion . Min Lightmap Resolution and Min Object Scale - are they ok to be bigger? Say, if I'm defaulting at 20, can I set Min Lightmap Resolution to 40 to be safe?

[deft fiber]

Yes, minimums only clamp the values if you're baking on low resolutions or small objects

Mip mapping is good to keep enabled as it allows you to reduce texture quality, and helps rendering in other ways

[edgy root]

Got it, cheers

[edgy root]

One last silly question, is Max Lightmap Size of 4096 ok or an overkill? 🙂

[deft fiber]

I guess it isn't, unless your target platform isn't good at dealing with big textures

Lightmap Size only determines if they get atlased onto a big texture or a bunch of smaller ones

The official guide suggests that a bigger lightmap atlas will take more up more memory, but I'm not sure how if you have just as many pixels with smaller atlases, just with more texture loads

[inner willow]

Big textures can be occasionally half-filled, so memory will be wasted.

[deft fiber]

That makes sense, though in my experience lightmap atlases of all sizes are usually half-filled

Kinda hoping that texture compression knows to skip the repeated empty pixels, but I don't know how it works really

[inner willow]

Hardware (GPU) supported block compression formats have fixed compression ratio. There is no dependency of image contents. It is better then uncompressed but still a waste.

[deft fiber]

I see!
Apparently variable bit rate formats only affect disk size

Doing some test bakes it looks as if the max lightmap size should be really low to force the lightmap not to waste huge amounts of space

[novel merlin]

Hey guys, after using area lights on my ceiling tile lights, there seems to be some weird things appearing on my walls/materials, and they look like wrinkles. How do I get rid of them? Is it a geometry issue, or material issue?

[deft fiber]

Compression artifacts, denoising artifacts, or both

Area lights require a lot of samples so the denoiser won't struggle

[novel merlin]

Which one of these values do I need to change?

[lapis lion]

maybe you can share your lightmap and directional lightmap debug views from this angle

does look like a filtering issue as Spazi suggests

[novel merlin]

Hmm, not sure which one you guys need so I'll send more:

I also use all the same settings on my lights

[limber delta]

Have you tried with a higher value for direct samples? It's very low. Maybe try 512 there as well and see if it makes any difference.

(basically what Spazi suggests)

[novel merlin]

Okay thanks! Will post results once it bakes again.

Hmm, there are some visible changes, but It all looked perfectly smooth until it didn't do the compression step... I'm not sure what the issue is anymore. Is there a way to not do compression, or to change the value of the compression?

[novel merlin]

I suppose clicking on lightmap compression (not in the screenshot) and setting it from highres to none should do the trick..?

[novel merlin]

The hallway has been fixed, but the room still has weird artifacts on the walls. Not sure what it could be anymore...

[lapis lion]

what values do your area lights have?

[novel merlin]

they're all the same value, heres the inspector and the light layout in the room

[lapis lion]

ok that looks fine. so what you will want to do at your lighting tab, were it says "filtering", you are using auto. set that to advanced and you will be able to set filtering for several lighting stages, you will want to set more aggressive or wider range denoising filter settings for indirect lights.

[valid kernel]

Hello guys I imported this fbx model to my scene and got these weird shadows. Anyone knows why?

[deft fiber]

Yes, I'd try that to verify how big of an effect removing compression has
(if you change the compression settings of the lightmap asset directly, you do not need to re-bake)
If the artifacts persist, then I'd disable denoising/filtering, with compression also off that gives you a raw view of where the light rays hit
You said you increased samples, if so how much? I'd bump up direct samples to at least 256

[deft fiber]

Looks like it could be SSAO
Try disabling it in the renderer asset (assuming you're on URP)

[valid kernel]

thank you will do that!

thank you it was that and the normals. It was con calculate

[primal viper]

anyone knows why my lighing bugs like this

[deft fiber]

Did you try the shadow blocker mesh as I suggested?

Could try extending one below ground to minimize shadow bias disconnecting the shadows

[primal viper]

oh i could try

[wispy dome]

Does anyone know how to get like a border glow effect like the one in the picture?

I also have curved places where I want it to "glow", so I don't know what to use.

[chilly kettle]

Do you bake lighting? Then you could do it with emission

[wispy dome]

I'm guessing that I need a separate gameobject down there with the correct shape right?

So that the entire model wouldn't glow

[chilly kettle]

Yep, you can model yourself something that fits behind the doors and give it a material with emission

[chilly kettle]

should give this effect

[wispy dome]

alright, thanks!

[wispy dome]

Actually one more question, will I only be able to see it once I bake the lighting?

[chilly kettle]

Well, you see it like a bright gameobject.
After baking, the light should also be visible on the surrounding models, if they are static.

[wispy dome]

Alright!

[wispy dome]

Does it matter if the object has the Mesh Renderer on or will the glow effect still be there when it is invisible?

Since if the object is invisible then I believe that the game would run slightly faster

[chilly kettle]

i think it must be on, but you can disable it after bake. Should work

the object has no impact to performance

[wispy dome]

Okay!

[wooden lagoon]

help why is this happening the lighting spreads across walls (photo) when viewed from certain angles even if said wall is out of range

[chilly kettle]

i see nothing weird there

[worthy chasm]

guys i need help

[wispy dome]

Uhh, there seems to be a problem, I have the emission on and set it to realtime, but no matter how high i set the intensity, anything around it isn't lighting up. I haven't tried using it with baked yet, since I fear baking takes a really long time for me, but surely the realtime thing should work somehow.

yeah fuck no I don't want to bake rn, my project is so small as well why does it take so long?

oh nevermind unity is just lying to me

[wispy dome]

Still tho, why wouldnt the emission show up in Realtime?

[little condor]

Is the emissive object set to static? And the objects that recieve light from that object need to be static too.

[wispy dome]

yes, they are

[little condor]

There is no 'real-time' way of emissive objects lighting other things, unless you use raytracing. So you'll need to bake the lightmaps.

[wispy dome]

what does the "Realtime" do then?

[little condor]

Probably for when using Enlighten.

You still need to bake it though.

[wispy dome]

The documentation seems to suggest that it can be done in runtime tho

[little condor]

Hmm. To be honest I did a quick test with GI a year or so ago and really struggled getting things working. A direct light in a GI scene was working OK but no dynamic objects would recieve light, even with probes.

[wispy dome]

If anyone here knows what could be the problem and how to fix it then please tell me, but I'm going offline for the day soon so I might not respond til' tomorrow.

oh, never mind, I guess realtime only allows for the object it self to be lit and can't illuminate anything when set to 'Runtime'

[dreamy flax]

as you can see my object looks way to bad in the shadow, normal doesnt show
how do i fix tyhis ? i assume it has something to do with lightning
the dark side off the object is also too dark imo

[wooden lagoon]

the red is on the wall on the left even though the range only reaches to the bed

[night shell]

looks like your going to have to rely on some other techniques to improve the lighting when in ambient spaces

with your scene lighting are you using the skybox ambient probe?

or just a single flat color

or a gradient?

[gritty fox]

?

split up the ceiling mesh (as suggested before in here) and still getting the same problem

ive fixed the uvs in blender, rebaked lighting etc still with the same problem

the ceiling is quite large so is there any other way to fix this problem other than sitting there for hours trying to cut it all up into pieces?

will changing the "scale in lightmap" fix anything? or increasing the lightmap size?

there also seems to be some lights that are not being baked properly or something? idk what that is or why

[viscid coral]

im using bakery to make my lightmaps, it looks great in most of the map but in some parts there are errors like this. Can anyone point me in the right direction into fixing this?
https://media.discordapp.net/attachments/1105135467701223518/1135452822150860880/image.png?width=1342&height=905

[deft fiber]

That wasn't a reply to you, I don't think

[deft fiber]

That many slices are problematic for lightmapping
I don't recommend going smaller than one continuous mesh per "room"
I believe the problem was caused in the first place by the geometry seams between your ceiling tiles causing lightmap seams, effectively flooding it with padding pixels
Which means you should use texturing for the ceiling panels and their borders, not different materials and preferably no extra geometry either

[little condor]

What are the properties on those lights that aren't being included in the bake?

[chilly kettle]

There exists a bakery discord, where the developer (Mr. F) answers questions now and then.

[burnt brook]

When i bake the lightning in my scene everything turns black, it looks fine while baking, but after its done it just turns black

[oak dawn]

would it be possible to disable global illumination for all baked lighting? wouldn't removing the indirect multiplier on light sources do that?

[gritty fox]

i know i was just asking about it

[deft fiber]

What about it specifically?

[gritty fox]

just what it is

also

[gritty fox]

they do have a little gab between them and all just use 1 texture

same uv maps

[deft fiber]

By shadow blocker I meant rather "light blocker" or just shadow mesh
Meaning any mesh for the purpose of blocking light, set to "shadows only" in the renderer
Usually cube or block shaped and with smooth normals
Because realtime shadow casting uses "bias" to shrink meshes to prevent self-shadowing, it may in some cases shrink them in the wrong way and cause gaps in the shadow to appear

[deft fiber]

The gaps between them are the problem

[gritty fox]

ah

so was splitting up the ceiling into 3 different meshes pointless then

[deft fiber]

Yes in this case

[gritty fox]

same as the lights that do

[gritty fox]

hmm

what do you recommend i do about that? i could delete all the individual tiles, then make a large plane and position it where the tiles are

[deft fiber]

Yes I'd recommend that, large enough to cover one or two room areas, but probably not like, kilometers long

You can use a grid mesh to repeat a texture multiple times over a surface like this

[gritty fox]

okay

[deft fiber]

Then when generating a lightmap for the mesh in the second channel you'll get just one continuous UV region like this
This is what I expect Unity will generate anyhow, you can do it manually too but there's usually no big reason to do so

I guess manually crafting a lightmap UV map devoid of any overlaps or big unnecessary margins could be a solution, but I'd prefer to sidestep the problem entirely and save a bunch of polygons in the process

[bleak zephyr]

Wtf is happening?

It seems that when the angular diameter is higher than 1 it starts glitching

[gaunt siren]

Can someone help me fix this lighting bug

[supple latch]

why is my map like this (Right screen)

oh Fixed it

[shadow sequoia]

found that the moment that i set my sprite material to sprite-default, i can no longer find the lit material, whats going on?

[deft fiber]

No idea
Can you make a new sprite, copy its lit material and paste into the old one?

[wooden lagoon]

can some one help please i cant use baked i wanna know why its doing this

[chilly kettle]

Do you have URP and realtime lights?

[abstract dagger]

this version of the bumper engine does something weird with the lighting, like almost all the shadows are pure black, the regular bumper engine doesn't have this issue, do y'all know how to fix it?

[zenith flax]

how do I get QualitySettings.shadows to affect shadows in URP? I am setting it at runtime and I cannot figure it out for the life of me. Any help is appreciated.

[deft fiber]

Never heard of this "bumper engine"
Maybe they have their own support channels

[wispy dome]

Whenever I try to bake unity gives me a warning saying that some UVs are overlapping. Does that mean that in blender I should leave a little space between each of the faces in UV editor? Or what exactly should I do?

[chilly kettle]

Well, depends on 100 things 😄

What kind of models have overlapping uv?

[wispy dome]

I think it is this one, and variants of this (it's a display)

[chilly kettle]

do you have prepared a second uv channel for the lightmaps manually?

[chilly kettle]

ah, no wonder 😄

Check "Generate Lightmap UVs" in the import settings of your model

[wispy dome]

import settings?

[chilly kettle]

if this doesnt help change the Min Lightmap Res. and the Min Object scale by hand.

[chilly kettle]

lol

[wispy dome]

I have the blender file straight up as a prefab in unity so i dont export/import it

dont know if that matters tho

[wispy dome]

also sorry, im kinda new to blender

[chilly kettle]

i dont know. Never using Blender files in Unity.
Click on your model in unity and then the inspector should show the import settings.

Down there is "generate lightmap UV"

if you hit this button and apply, it could already be done.

[wispy dome]

now i just try again and see if the warning comes again?

[chilly kettle]

yep. If it does, you have to manually change these settings

[wispy dome]

ooh

the number went down from 35 to 13

i guess I have more assets i need to do this to

[chilly kettle]

every model is listed in the console

[wispy dome]

oh also but is baking light supposed to look like this in the start?

(there are some objects with emission material)

[chilly kettle]

It should never look like this. 😄

you have finished bake?

[wispy dome]

no

[chilly kettle]

okay. then wait

[wispy dome]

actually what the warnings are still there, guna fix them first

if I do 'Generate UV Lighmaps' does it generate it for all the children too?

[wispy dome]

since one of the child objects seems to be giving the warning still

[chilly kettle]

If you dont provide a good UV map, you have to generate lightmap uvs for every model.

[wispy dome]

but i did generate them

[chilly kettle]

.

There you have to type in which resolution you are baking (for example if you are baking with 10texels then write 10 in this field. Anf if your models have a smaller size than 0.5 then write in the minimum size you are using

[wispy dome]

what does the size contribute to? How high res the baking is?

[chilly kettle]

This setting from your Lightmap is = Minimum Lightmap Resolution.
If you are Baking with more than 20 you dont have to change in in the import settings.

[wispy dome]

oh shit this is prob because the emission material intensity was on 50

[chilly kettle]

And the transform of your model = min object scale ( you only have to change it, if your model is smaller than 0.5)

[wispy dome]

everything should have scales of 1 i think

[wispy dome]

anyways, do i play around with this number until it gets fixed?

[deft fiber]

@wispy dome Assuming all your meshes have lightmap UV generation enabled, you can also follow the steps here
https://docs.unity3d.com/Manual/ProgressiveLightmapper-UVOverlap.html

[chilly kettle]

nope, you just to have a look how you use your models ^^
If you have a Model that has a scale of 0.3 in your scene, just type in 0.3 in your import settings of this specific model..
And if you bake with 10 Texels then type in 10 into the import settings.

[deft fiber]

Lightmap preview window and scene view GI draw modes help you locate the UV overlap issues

But it's possible your bake has other issues too

[wispy dome]

but how do I know how many texels i bake with?

or do i just choose that?

[chilly kettle]

Well, you set it yourself in the lighting settings?

[wispy dome]

i didnt set anything there yet

[wispy dome]

yeah no i get i have to change that, idk just to what. imma put it at 10 for now

[chilly kettle]

if you put it at 10, you have to change the import settings for every single model to 10 also.

try 20 , so you dont have to change every model.

and check if you still have overlaps.

If so, follow the guide from spazi

[wispy dome]

wait hold on this look different from mine

oh you cahnge it there

my bad

[wispy dome]

but do i keep it on 40 texels in the import settings on the models, or change them to 20 too?

[chilly kettle]

if you bake your lightmap at 40 texels its fine

[wispy dome]

but i still change the lighting settings to use 20?

Also sorry for this many questions, I have just never done anything like this before

[chilly kettle]

You can use 20 also. No problem.

Just bake it and see if you still have overlaps

[wispy dome]

now the amount of overlaps wen from 13 to 26

holy fuck it is 57 now (i forgot to apply the import settings before)

[wispy dome]

so to answer the question, yes it does

[chilly kettle]

then you have to look on each object and go through this

or ignore it, if you cant see a weird lightmap behaviour

[wispy dome]

so basically i have to leave a space between each UV thing?

[chilly kettle]

This does the "generate lightmap uv" automatically

[wispy dome]

what

it is done automatically?

[wispy dome]

if so then what am i supposed to do? I thought the website told me to do it manually no?

[wispy dome]

How do I change the draw modes? I couldn't find it

[deft fiber]

It may help to locate and identify the issue first
And by that I mean it's crucial

[deft fiber]

https://docs.unity3d.com/Manual/GIVis.html

[wispy dome]

yeah i went there, but i didndt find how to change the draw modes

[wispy dome]

oh there

thanks

[wispy dome]

am i supposed to look at them after baking?

or before