#archived-shaders | Official Unity Discord | Page 113

still orbit Mar 18, 2019, 5:22 PM

#

geometry queue is 2000-3000

#

but by default in builtin renderer 2500-3000 is reserved for alpha test

frigid zinc Mar 18, 2019, 5:22 PM

#

most see the fact you can hide part of the model as a form of transparency

#

but I get what you're saying

still orbit Mar 18, 2019, 5:23 PM

#

ok well thats not true is my point 😛

frigid zinc Mar 18, 2019, 5:23 PM

#

right

still orbit Mar 18, 2019, 5:23 PM

#

you can discard pixels on anything, its not transparency

frigid zinc Mar 18, 2019, 5:23 PM

#

it's opaque with cutaway

still orbit Mar 18, 2019, 5:23 PM

#

in SRP we removed this distinction

#

alpha test is available on everything and the alpha test "queue" is gone

frigid zinc Mar 18, 2019, 5:23 PM

#

that's why alpha test doesn't have transparency sorting issues

still orbit Mar 18, 2019, 5:23 PM

#

exactly

#

its sorting front to back

#

which you cant do with transparency (normally)

tame topaz Mar 18, 2019, 5:25 PM

#

Awesome, thanks guys. That helped explained my issue for sure.

frigid zinc Mar 18, 2019, 5:25 PM

#

can't wait for your constants refactoring demo 😛

tame topaz Mar 18, 2019, 5:25 PM

#

Slowly getting better 😢

mossy smelt Mar 18, 2019, 5:47 PM

#

just had to hard boot for the first time since I got this PC 4 years ago due to HDRP not using the gpu to create a rather large cubemap. Someone please tell me how I have the stamina to convert back to unity standard, and how HDRP really doesn't have much mroe to offer

#

otherwise I'm going to frustrated and throw in towel for another good while

broken field Mar 18, 2019, 6:03 PM

#

@still orbit wondered if it's worth me rolling my own grass shader that uses signed distance field for the edge smoothness (AA) + alpha test only.

wondering since HDRP does a depth prepass so I might not gain any perf from this ... any thoughts welcome

tribal plume Mar 18, 2019, 6:05 PM

#

hi guys, is there a way to use atomic adds for floats in compute shaders?

still orbit Mar 18, 2019, 6:07 PM

#

@broken field Depends on your setup I guess. Wouldnt you be doing this directly in the depth prepass anyway?

broken field Mar 18, 2019, 6:09 PM

#

didn't think about it like that actually!

still orbit Mar 18, 2019, 6:10 PM

#

isnt alpha clipping always applied i nthe depth prepass in HDRP?

broken field Mar 18, 2019, 6:10 PM

#

I read horizon zero dawn's techique of using SDF on vegetation (baked into the alpha channel) so figured it would be a nice pair for alphatest only shaders

frigid zinc Mar 18, 2019, 6:10 PM

#

@tribal plume the only info I could find about that is in this thread: https://www.gamedev.net/forums/topic/678937-atomic-add-for-float-type/

GameDev.net

Atomic Add for Float Type

Hi, I was searching the specifications for a possibility to do atomic addition for buffer variables of type float. But unfortunately I have found only atomic operations on integer types: https://www.opengl.org/wiki/Atomic_Variable_Operations This is a big problem for me now. ...

#

which mostly seems to say 'maybe on some hardware' and 'generally don't do that'

tribal plume Mar 18, 2019, 6:12 PM

#

ugh, yeah it seems like i have to convert to int @frigid zinc then convert back

frigid zinc Mar 18, 2019, 6:12 PM

#

seems so

tribal plume Mar 18, 2019, 6:12 PM

#

gonna have to cap it too to avoid overflow

short thunder Mar 18, 2019, 6:21 PM

#

Hello! Can someone point me directions/ materials how to learn the new shader graph, map types or shaders in general? I just finished watching Brackey's vertex displacement grass tutorial and started wondering how do you know/ learn which nodes to apply and when. Not much point of just adding nodes step by step while following a tutorial if you don't know what you are really doing

frigid zinc Mar 18, 2019, 6:22 PM

#

well I assume you know about the shadergraph documentation

#

other than that, it's probably a good idea to learn shader basics, even though most of the tutorials are pre-graph.

#

the concepts behind what you're doing remains the same so it's a good place to start

#

https://catlikecoding.com/unity/tutorials/rendering/

Unity Rendering Tutorials

A collection of tutorials that cover how to write your own shaders in Unity.

#

as always I recommend this series, it starts assuming you know absolute zero about shaders and walks you up to some advanced concepts

#

he has also recently started a series on Scriptable render Pipeline:

#

https://catlikecoding.com/unity/tutorials/scriptable-render-pipeline/

Unity Scriptable Render Pipeline Tutorials

A collection of tutorials that cover the scriptable render pipeline of Unity.

#

it's more broad but also has a section on 'custom shaders'

tribal plume Mar 18, 2019, 6:27 PM

#

catlikecoding one is outdated though 😦

#

was made while srp was still experimental

still orbit Mar 18, 2019, 6:28 PM

#

https://docs.unity3d.com/Packages/com.unity.shadergraph@5.9/manual/index.html

frigid zinc Mar 18, 2019, 6:28 PM

#

yeah probably true

still orbit Mar 18, 2019, 6:28 PM

#

That's the sg docs

frigid zinc Mar 18, 2019, 6:28 PM

#

mainly I suggest the first part, to learn the reasons for doing what you do when making shaders.

short thunder Mar 18, 2019, 8:23 PM

#

alright, I'll check these out, thanks!

vocal narwhal Mar 18, 2019, 9:08 PM

#

I find looking at tutorials for other (shader) node graph systems will help your knowledge. All though SG is not as fully featured yet the all the knowledge is transferable. Shader Forge should have some fun shader examples out there, ASE, even Unreal's should help @short thunder

mossy smelt Mar 18, 2019, 9:36 PM

#

best way to combine meshes using different materials (20,000 + vertices, 10 distanct materials(shaders)/submeshes? (without creating a gameobject, so ECS preferably

frigid zinc Mar 18, 2019, 9:38 PM

#

https://www.assetstore.unity3d.com/en/?stay#!/content/31895

#

that's what tools like mesh baker do

#

they combine the meshes and atlas the textures

#

so it's one mesh with one texture

#

combining meshes is easy

#

littler trickier to atlas but not that hard really

mossy smelt Mar 18, 2019, 9:39 PM

#

ah, cool,, so it's just liike a really long shader definition?

frigid zinc Mar 18, 2019, 9:40 PM

#

basically like, if you combined 4 meshes, it would adjust the UV space so each mesh's UVs take up 1/4 the UV space

#

and then combine the textures in that 4 quadrant arrangement

#

of course all the materials have to use the same shader

#

(i.e. standard shader)

mossy smelt Mar 18, 2019, 9:42 PM

#

ok, and yea, I'm been able to make some shaders really versatile , so that shou;dn't bve a big deal for my application

frigid zinc Mar 18, 2019, 9:43 PM

#

yeah you could probably do that if you're comfortable with shaders

mossy smelt Mar 18, 2019, 9:48 PM

#

Im getting there, had my first look in one when I needed to rotate my skybox, I've been perusing prefab files, obj file, and so forth experimenting with little changes ever since. There really self descriptive and easy to follow, but I do like just messing around with the node based approach better. Thanks @frigid zinc , going to give it a try and learn something new

strong pelican Mar 19, 2019, 10:11 AM

#

Shader gods I have a question

#

if I have two sprites placed on the same spot. How can I show the half of each Sprite instead of the one on top?

#

I was told this can only be done with shaders

tranquil zephyr Mar 19, 2019, 10:59 AM

#

Shader gods, I beg your assistance.
I have a shader that scales an object, but after some prodding I came to realize that it doesn't work in my case because I'm using a flat mesh (A plane, pretty much), which means that its normals are always facing forward, so it can't be scaled along its normals.
Just multiplying vertex positions doesn't work either since it seems that the vertex position I get as input is the position relative to the world and not local space.
Any suggestions?

plucky bone Mar 19, 2019, 11:06 AM

#

Scale relative to the center of the mesh?

#

float4 objectOrigin = mul(_Object2World, float4(0.0,0.0,0.0,1.0));

tranquil zephyr Mar 19, 2019, 11:12 AM

#

@plucky bone And then I just need to multiply objectOrigin by the scale value and pass it into output.pos = UnityObjectToClipPos(objectOrigin * _Scale); ?

plucky bone Mar 19, 2019, 11:37 AM

#

Nah, you calculate the direction to your vertex from the origin

#

Then you do origin + direction * scale

tranquil zephyr Mar 19, 2019, 11:45 AM

#

Works great now, thanks 😃

plucky bone Mar 19, 2019, 11:46 AM

#

Sweet 😄

tranquil zephyr Mar 19, 2019, 3:02 PM

#

So the method worked, but the result isn't really what I looked for.
The purpose was to get an outline on a mesh, but scaling the mesh makes it so that some edges of the shape have thicker outlines than others.
I know that the general approach to outline shaders is to extrude the normals of a mesh, but in the case of a mesh, all normals face the same direction, so that approach doesn't apply.
Any suggestions?

#

📎 unknown.png

grand jolt Mar 19, 2019, 3:15 PM

#

https://gamedev.stackexchange.com/questions/156902/how-can-i-create-an-outline-shader-for-a-plane

Game Development Stack Exchange

How can I create an outline shader for a plane?

All these toon shaders I have been seeing render an duplicated mesh behind it and extrude the normals of the vectors to make it look like it has a border, but it feels a bit hacky to me.

Basically...

tranquil zephyr Mar 19, 2019, 3:16 PM

#

Thanks, but that only works for simple planes such as quads. In my case above each of the shapes is a mesh of its own.

valid flax Mar 19, 2019, 3:27 PM

#

📎 unknown.png

#

any idea how to fix this? I want to combine them togheter, not show one over the other.
both of them are transparent shaders, yet the river shows above the lake

#

how to combine them?

amber saffron Mar 19, 2019, 3:28 PM

#

This seems to be a sorting issue. Check the renderqueue

tranquil zephyr Mar 19, 2019, 3:29 PM

#

You could use a Stencil buffer to tell if a pixel had already been painted by the lake and not draw pixels from the river.

valid flax Mar 19, 2019, 3:31 PM

#

@tranquil zephyr I wont the effects to combine, not show 1 over the other. I want both visible. and @amber saffron they're on the same render queue

tranquil zephyr Mar 19, 2019, 3:31 PM

#

Combined in what manner?

valid flax Mar 19, 2019, 3:32 PM

#

right now the river shader is overwriting anyhting the lake shader is doing

#

I want to let the lake shader do it's thing, and then on top of that I want to apply the river shader

#

so I don't want to stencil anything out

amber saffron Mar 19, 2019, 3:36 PM

#

Change the lake render queue to be lower, so it should be rendered before

valid flax Mar 19, 2019, 3:36 PM

#

the thing is, when inside the lake ( which is possible, I want to see the river still, so that won't work either

#

cause then it'll cause the same issue but the other way

#

📎 unknown.png

#

also, it doesn't always "glitch" out

broken field Mar 19, 2019, 3:37 PM

#

yeah transparency doesn't have depth but kinda does in HDRP

valid flax Mar 19, 2019, 3:37 PM

#

whenever I have a certain distance/angle on it, then it bugs out

#

other times it's perfectly the way I want it to

broken field Mar 19, 2019, 3:37 PM

#

I suggest you make the river opaque and fake the transparency for it

#

or

#

disguise the meet between the two transparent obejcts because transparent does not write to depth buffer, one transparent object can only be in front or behind the other... does that make sense?

#

that's what is happening here its sorting

valid flax Mar 19, 2019, 3:39 PM

#

they don't meet, ever, they're just planes who don't touch

#

and can I not control the sorting? I thought that's what the render queue is for >.<

broken field Mar 19, 2019, 3:39 PM

#

well the origin of the water plane is closer than the river and they're sorted like that

valid flax Mar 19, 2019, 3:39 PM

#

but it works 95% of the time, except it doesn't at some weird distances/angles

broken field Mar 19, 2019, 3:39 PM

#

cos the pivot will be closer on some angles and behind on others

#

make sense?

amber saffron Mar 19, 2019, 3:40 PM

#

Also, it seems that the river is writing depth. I think it shouldn't

broken field Mar 19, 2019, 3:40 PM

#

apprarently its not touching

valid flax Mar 19, 2019, 3:41 PM

#

📎 unknown.png

#

side-view; not touching

#

just to demonstrate

broken field Mar 19, 2019, 3:42 PM

#

yeah well the middles of each 3d transparent object is used to sort them

#

laughs at "middles"

valid flax Mar 19, 2019, 3:42 PM

#

their pivot is used to sort?

#

object pivot or triangle pivot?

amber saffron Mar 19, 2019, 3:43 PM

#

More the center of the bounds irrc

valid flax Mar 19, 2019, 3:43 PM

#

the bounds of the object or the bounds of the triangle? :p

amber saffron Mar 19, 2019, 3:44 PM

#

Object

#

But the RenderQueue sorting should get rid of this issue

#

Else, it could be a good idea to separate a bit more your objects.
Lake / River / Cascade

valid flax Mar 19, 2019, 3:56 PM

#

cascade?

#

don't know that word, (sorry not english)

#

anyway, messed with some more of the render queue and it worked, thanks!

amber saffron Mar 19, 2019, 4:10 PM

#

Waterfall 😃

#

But glad you resolved your issue

fervent pelican Mar 19, 2019, 5:56 PM

#

Hello, I'm trying to make this work but it doesn't quite seem to. https://gamedev.stackexchange.com/questions/152824/how-can-i-create-a-see-behind-walls-effect Can anyone help out? Thanks.

Game Development Stack Exchange

How can I create a "see behind walls" effect?

Divinity: Original Sin 2 has a beautiful see-through system. When I go behind walls, a splash mask will appear, and when I move around the game, it changes. It's like a dissolve shader, and has a

frigid zinc Mar 19, 2019, 6:00 PM

#

honestly that is a long and messy page

#

can you just take a photo of your version or upload it someplace so we can access it?

#

would be easier to see the issue from that

fervent pelican Mar 19, 2019, 6:01 PM

#

Yeah let me see what I can do 😄

#

And yes, it's quite messy and confusing.

frigid zinc Mar 19, 2019, 6:02 PM

#

also which are you targeting, HDRP or LWRP?

fervent pelican Mar 19, 2019, 6:03 PM

#

I'm on standard. Does it have to be HDRP or LWRP?

#

I reckon since it's from 2015, probably standard.

#

So the guide said to "Use this as mask and this as the wall" https://hatebin.com/rbrnrqqphk < Wall https://hatebin.com/qtmiwrszbr < Mask

frigid zinc Mar 19, 2019, 6:05 PM

#

oh ok, I just assumed since I saw Shadergraph in the photos

fervent pelican Mar 19, 2019, 6:05 PM

#

Wait the post is from 1 year ago

#

How did I see 2015

#

Anyway I reckon the Wall one goes on the wall and the mask goes on the player?

frigid zinc Mar 19, 2019, 6:07 PM

#

i'll stil have to read the post to see how to use these so bear with me

fervent pelican Mar 19, 2019, 6:07 PM

#

No problem man. I appreciate the help.

frigid zinc Mar 19, 2019, 6:11 PM

#

seems to be working for me

#

https://i.imgur.com/X2T4Akm.png

Imgur

#

I put the wall on the wall

#

and the mask on the sphere

#

and the sphere is cutting out a hole when in front of the wall

#

or really when behind it

#

or really wherever it is

fervent pelican Mar 19, 2019, 6:12 PM

#

But the mask is always invisible right?

frigid zinc Mar 19, 2019, 6:12 PM

#

yes

#

I think that's the point

fervent pelican Mar 19, 2019, 6:12 PM

#

Hmm

#

I thought it was suppose to be like the top

frigid zinc Mar 19, 2019, 6:13 PM

#

you'd put whatever you want to reveal behind the wall

fervent pelican Mar 19, 2019, 6:13 PM

#

Picture

frigid zinc Mar 19, 2019, 6:13 PM

#

and this sphere would reveal it

fervent pelican Mar 19, 2019, 6:13 PM

#

How the heck did he reach this https://user-images.githubusercontent.com/16706911/34574395-851a7682-f18c-11e7-8765-26ec2f5fee9b.jpg

#

That's what I was hoping to achieve. However I've gotten the same as you.

frigid zinc Mar 19, 2019, 6:13 PM

#

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

Imgur

#

so like the blue is shown by the mask

#

now the texture yes, may allow you to perturb the shape of the hole

#

but you need a texture made for that

fervent pelican Mar 19, 2019, 6:14 PM

#

A noise texture or whatever it's called.

frigid zinc Mar 19, 2019, 6:14 PM

#

let me see what channel is used

#

yeah they are just using the texture as a mask

#

white and black

fervent pelican Mar 19, 2019, 6:15 PM

#

So getting this effect https://user-images.githubusercontent.com/16706911/34571588-2aca263a-f184-11e7-80c1-1a6c6f197f41.jpg Is not quite working.

frigid zinc Mar 19, 2019, 6:16 PM

#

https://i.imgur.com/5ByQPgH.png

Imgur

#

so see by using this grid texture for instance, and seting the cutoff

#

https://i.imgur.com/CfS9Spg.png

Imgur

#

grid is put on the sphere and only reveals part

#

(would be better with a plane, not a sphere lol

#

but that's the general idea

#

you have to make a texture to create the look you want

fervent pelican Mar 19, 2019, 6:17 PM

#

Aaaah I see.

frigid zinc Mar 19, 2019, 6:17 PM

#

you'd need a 'wavy hole' texture

#

let me use a plane so it's more plain 😛

fervent pelican Mar 19, 2019, 6:17 PM

#

So you need a texture in the shape of what you want the hole to look like

frigid zinc Mar 19, 2019, 6:18 PM

#

https://i.imgur.com/wBG6rMF.png

Imgur

#

yes, now the hole resembles the texture

#

https://i.imgur.com/06nsGo5.png

Imgur

#

the cutoff value decides how much is cut away and how much is not

fervent pelican Mar 19, 2019, 6:19 PM

#

Yes indeed. I see now.

frigid zinc Mar 19, 2019, 6:19 PM

#

in fact it could be animated

#

so the hole 'grows' and 'shrinks'

fervent pelican Mar 19, 2019, 6:20 PM

#

I do understand now. So it seems I DID make it work, it's just that well I thought it would work on my player, so I applied the mask to the player and well the player disappeared 😛

frigid zinc Mar 19, 2019, 6:21 PM

#

https://imgur.com/OJHWkiU

Imgur

#

that texture I used isn't really the best but you get the idea

fervent pelican Mar 19, 2019, 6:24 PM

#

Yep

#

The hole will look based on what texture you use

#

And you can animate it

#

To make it change size

frigid zinc Mar 19, 2019, 6:32 PM

#

you could even get really clever and make a sprite atlas that has looped animated frames

#

and cycle through them to make the shape wobble around and look cool

#

you'd have to modify the shader to support a frames atlas though. but i'm sure there's tutorials for that.

#

https://unitycoder.com/blog/2018/11/30/sprite-sheet-flip-book-shader/

Unity Coding - Unity3D

Sprite Sheet Flip Book Shader

Converted this old animated sprite sheet script into shader, its useful for animating sprites from sprite sheet. (when Animator is too heavy for simple sprite animation) Could be extended to have b…

#

something like that

fervent pelican Mar 19, 2019, 6:34 PM

#

Thanks man 😄

#

And can all this be applied on the player? So that when the player is behind a wall it does that.

frigid zinc Mar 19, 2019, 6:36 PM

#

you'd have to find a way to make the mask plane follow the player and stay oriented toward the camera

#

simple billboarding could handle the keeping oriented to the camera

#

there's a few ways to handle the following

#

maybe attach it to the player

#

or use some type of follow script

fervent pelican Mar 19, 2019, 6:38 PM

#

Something like this?

#

One sec

#

https://hatebin.com/ghhhtlifhk

frigid zinc Mar 19, 2019, 6:40 PM

#

doesn't seem to work

fervent pelican Mar 19, 2019, 6:41 PM

#

Hm, the guy posted that as Billboarding.

frigid zinc Mar 19, 2019, 6:41 PM

#

well there's some billboarding shaders that are poorly done

fervent pelican Mar 19, 2019, 6:41 PM

#

Could be it.

frigid zinc Mar 19, 2019, 6:41 PM

#

i'd probably use the script variant if i'm going to move it anyway

fervent pelican Mar 19, 2019, 6:42 PM

#

yeah

#

Would work better

frigid zinc Mar 19, 2019, 6:44 PM

#

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class CameraFacingBillboard : MonoBehaviour
{
    public Camera m_Camera;

    void Update()
    {
        transform.LookAt(transform.position + m_Camera.transform.rotation * Vector3.forward,
            m_Camera.transform.rotation * Vector3.up);
    }
}

#

can use this with a Quad instead of a plane

#

https://imgur.com/DWWVMlv

Imgur

#

have to manually assign the camera to the script variable inspector

fervent pelican Mar 19, 2019, 6:51 PM

#

So add the script to the camera?

frigid zinc Mar 19, 2019, 6:51 PM

#

no to the plane

#

er quad

fervent pelican Mar 19, 2019, 6:51 PM

#

Ah

#

And then drag the camera to the variable

frigid zinc Mar 19, 2019, 6:51 PM

#

yes

fervent pelican Mar 19, 2019, 6:52 PM

#

Sweet.

#

You helped a lot, I was quite confused at the start 😄

#

Now I know how what works at least.

#

Yeah I figured. Since it's the one that's suppose to move

#

Is it possible to use two cameras? One for actual player and stuff, the other just for this

frigid zinc Mar 19, 2019, 6:55 PM

#

I mean you could sure

#

you could put it in a layer

#

and have the other camera only render that layer I suppose

#

but it would have to be everything Plus that layer

#

otherwise there would be nothing for it to see through

#

but it's only going to face one camera, the one it's configured to

#

so in the other camera view it would appear facing the wrong way

#

but if that camera can't see it, wouldn't matter I guess

#

i wouldn't do it that way unless there's a very good reason though

#

makes it very complicated

broken field Mar 19, 2019, 6:57 PM

#

It's a reasonably bad idea to do multi-cam-anything perf wise

fervent pelican Mar 19, 2019, 6:57 PM

#

Yeah true enough

frigid zinc Mar 19, 2019, 6:57 PM

#

well, not necessarily

fervent pelican Mar 19, 2019, 6:57 PM

#

Just complicates things too

frigid zinc Mar 19, 2019, 6:57 PM

#

if both cameras are rendering completely different things, it's fine

#

but if you're rendering the same things more than once, it's bad

#

for instance I use one camera to only render UI

fervent pelican Mar 19, 2019, 6:58 PM

#

Yea I suppose if the 2nd camera only rendered walls

frigid zinc Mar 19, 2019, 6:58 PM

#

and another camera to only render the rest

#

and there's nothing wrong with that at all

broken field Mar 19, 2019, 6:58 PM

#

well unity will perform full culling per camera all over again, plus all callbacks etc for any stages it does. For a simple demo you won't notice any perf hit. but the perf hit rises quickly the more things there are to cull

frigid zinc Mar 19, 2019, 6:59 PM

#

there's no reason to cull for UI

broken field Mar 19, 2019, 6:59 PM

#

and it won't show in profiler well

#

it will still do it.

#

it will still go through every single layer

frigid zinc Mar 19, 2019, 6:59 PM

#

not if you uncheck the culling box LOL

broken field Mar 19, 2019, 6:59 PM

#

it will do it for frustum

#

you can't prevent it

frigid zinc Mar 19, 2019, 6:59 PM

#

https://i.imgur.com/KhOu8qR.png

Imgur

#

there's no frustrum

#

UI camera isn't perspective

broken field Mar 19, 2019, 7:00 PM

#

it will still do frustum culling per camera for everything, regardless if occlusion is ticked or not.

#

this is why unity disallow it on SRP

#

its well documented and known

frigid zinc Mar 19, 2019, 7:00 PM

#

tehre's nothing there but the UI canvas

#

so there's literally nothing to cull

broken field Mar 19, 2019, 7:01 PM

#

doesnt matter

frigid zinc Mar 19, 2019, 7:01 PM

#

yes it does 😃

broken field Mar 19, 2019, 7:01 PM

#

it will still check everything

#

i know this for a fact lol

frigid zinc Mar 19, 2019, 7:01 PM

#

if you have no work to do, you can't say 'all that work will bog down your PC'

broken field Mar 19, 2019, 7:01 PM

#

it's badly made.

frigid zinc Mar 19, 2019, 7:01 PM

#

it literally goes 'nope' and returns

broken field Mar 19, 2019, 7:01 PM

#

they fixed it for SRP

frigid zinc Mar 19, 2019, 7:02 PM

#

it cant' check 'everything' the only thing in the layer is the UI

broken field Mar 19, 2019, 7:02 PM

#

every camera in the scene will still check every layer, disabled or otherwise.

#

for every object.

frigid zinc Mar 19, 2019, 7:02 PM

#

unless you'd have me believe layers mean nothing which I call bullshit

broken field Mar 19, 2019, 7:02 PM

#

it simply won't render it but it will still check it

frigid zinc Mar 19, 2019, 7:02 PM

#

because I know they do

#

anyway you do you, and I'll do me I guess

#

😛

broken field Mar 19, 2019, 7:03 PM

#

hopefully unity will talk about it, give them a poke

frigid zinc Mar 19, 2019, 7:03 PM

#

you seem to have a strange obsession with optimization when you have nothing to optimize yet 😛

#

Optimizing is the last step in gamedev

broken field Mar 19, 2019, 7:04 PM

#

best is using drawmeshindirect

#

then it wont have the culling overhead (by culling i mean it checks each object against the camera planes, it has to because in builtin renderer, the state of everything could have changed)

#

and (for reasons I don't understand) it will still do this even for stuff it doesn't render layers for

#

i dunno why it goes through all the layers

frigid zinc Mar 19, 2019, 7:06 PM

#

sorry don't buy that

#

if a camera is set to only render a layer

#

there is no reason for it to be worrying about anything that isn't in that layer

#

for all intents and purposes the other layers don't exist

broken field Mar 19, 2019, 7:07 PM

#

well I read that from unity staff on forums and it was indeed years ago. i dont believe it changed though because I recall SRP discussion about why SRP disallows multiple cam rendering and this was one of the issues

#

it was also an issue for a couple of mobile titles I did - I found even excluding rendering layers didn't improve cpu time

#

but this is an older unity

#

will try find

#

maybe staff can correct me

#

(I want to be wrong in this case)

#

It is illogical for a camera to perform frustum culling on layers it isn't supposed to be rendering I agree

#

perhaps I mixed that up with their checks for onbecamevisible/invisible etc

frigid zinc Mar 19, 2019, 7:10 PM

#

well I've been using my 3 camera setup because ti was recommended (and true I forget who or where it was)

broken field Mar 19, 2019, 7:10 PM

#

but I believe the object visibility might be one reason why cameras go through the whole thing

frigid zinc Mar 19, 2019, 7:10 PM

#

but it went against my better nature at the time, but I saw the wisdom of their argument after trying it

#

i haven't seen any performance issues from using it

#

UI camera, Scene camera, and both culminate into a main camera

#

which has all the Post effects

broken field Mar 19, 2019, 7:11 PM

#

@sage hornet please rescue us!

frigid zinc Mar 19, 2019, 7:11 PM

#

the main camera doesn't actually render anything but post effects

broken field Mar 19, 2019, 7:12 PM

#

the TLDR is that builtin renderer will still go through all the layers and check all objects to render per cam

frigid zinc Mar 19, 2019, 7:12 PM

#

or it may be the other way around

#

i have to go see, ti's been years since i looked at the camera setup

prisma yacht Mar 19, 2019, 7:12 PM

#

Do someone know how to port old shaders from Unity 5.1 GLSL into nowadays actual shaders?

broken field Mar 19, 2019, 7:13 PM

#

GLSL to HLSL is a minor fix up

frigid zinc Mar 19, 2019, 7:13 PM

#

yeah I've never had much issue using unity 5 shaders in newer unity

#

only some minor issues with Fixed stuff

prisma yacht Mar 19, 2019, 7:14 PM

#

hmm, i have some kind of shaders issues after it's decompilation -_-

#

it's works only for 5.1

frigid zinc Mar 19, 2019, 7:14 PM

#

https://docs.unity3d.com/Manual/SL-ImplementingTexGen.html

#

the Texgen stuff was depreciated

#

but they explain here how to work around the most common ones

prisma yacht Mar 19, 2019, 7:17 PM

#

SubProgram "gles3 " {
Keywords { "DIRECTIONAL" "SHADOWS_OFF" "LIGHTMAP_OFF" "DIRLIGHTMAP_OFF" }
"!!GLES3#version 300 es```

#

dunno how to simple convert that shaders into new ones -_-''

frigid zinc Mar 19, 2019, 7:17 PM

#

oh you mean literal GLSL

prisma yacht Mar 19, 2019, 7:17 PM

#

just look at them

frigid zinc Mar 19, 2019, 7:18 PM

#

i didn't even know Unity allowed that, first time I've ever seen it

prisma yacht Mar 19, 2019, 7:18 PM

#

that's used here

#

but i don't understand how they works 😄 and how to convert them

frigid zinc Mar 19, 2019, 7:19 PM

#

yeah i wouldn't even know where to begin

#

and really this looks like a ripped out shader?

#

so many 'tmp' variables

broken field Mar 19, 2019, 7:19 PM

#

why not use shadergraph an make new if inexperienced

prisma yacht Mar 19, 2019, 7:19 PM

#

they are.

frigid zinc Mar 19, 2019, 7:20 PM

#

so you ripped these out of a game?

prisma yacht Mar 19, 2019, 7:21 PM

#

original ones gone with HDD, i did ripped them from compiled project before. And trying to update that thing from 5.1 Unity to newer....

#

Originally that is Android GLES shaders, wich is deprecated

frigid zinc Mar 19, 2019, 7:22 PM

#

well part of the rules here is: "you can't Share content or discuss any form of pirated or illegal content."

#

so unless you're saying this is your game, we can't even discuss this.

prisma yacht Mar 19, 2019, 7:23 PM

#

😉 there is question not about content enviroment

#

that question about how to convert such shaders.

broken field Mar 19, 2019, 7:24 PM

#

I can and will discuss my peg leg, you can't tell me not to. I prefer a good oak polish finish and a fatter peg if I'll be doing general deck swabbing around the ship since it won't get stuck in holes or gaps and will also provide much needed stability when I lean.

but off-ship (usually when plundering) I prefer a slightly longer and thinner stump. As for pirate parrot choices, anything that nibbles me lobes and shrieks whenever I try to stealth is ideal.

prisma yacht Mar 19, 2019, 7:25 PM

#

hmm maybe is there some kind of tool for it... 🤔

frigid zinc Mar 19, 2019, 7:25 PM

#

well, i don't know of any way to turn a decompiled shader into original source code.

#

and even if I did, (i don't), i couldn't discuss it with you hehe

broken field Mar 19, 2019, 7:26 PM

#

you've made ceebee grit his wooden teeth

prisma yacht Mar 19, 2019, 7:26 PM

#

^_^ no one like reverse engineers seems like that

frigid zinc Mar 19, 2019, 7:27 PM

#

in any event, because of the rules, i would suggest you abandon this line of questioning here.

prisma yacht Mar 19, 2019, 7:28 PM

#

is there the rule about decompiled shaders? If that is my own shaders? 0_o

#

Or i should you show off my Tencent contract?

#

print screen

#

Well, ok 😦

frigid zinc Mar 19, 2019, 7:32 PM

#

well it's odd if you own the game you dont' already have the source code

#

you could see why i'd be skeptical.

#

in any event, even if i wanted to help, i can't

#

what you're asking for really isn't possible

quaint grotto Mar 20, 2019, 12:01 AM

#

how do you declare the compute shader layout for unity compute shaders

#

is dispatch on the c# side the layout ? or is that the threads

#

bit confused which way around it is

foggy falcon Mar 20, 2019, 1:25 AM

#

as a programmer who is used to rolling his own shaders, how do I do instanced properties for ShaderGraph shaders, as I'd like to use MaterialPropertyBlock for some custom UI rendering?

Do LWRP shadergraph shader support it out of the box or is there something I have to do specifically?

frigid zinc Mar 20, 2019, 1:48 AM

#

https://forum.unity.com/threads/feedback-wanted-shader-graph.511960/page-3#post-3354433

Unity Forum

Feedback Wanted: Shader Graph

.ShaderGraph files are json files? Why not yaml?
Just a curiosity.
https://docs.unity3d.com/Manual/JSONSerialization.html
it's the built in text...

#

back in January they said they would be adding it 'soon'

#

so i have no idea if it's been added yet or not

#

I've heard instancing is a checkbox on the master node

broken field Mar 20, 2019, 1:49 AM

#

sure is

#

dots option

frigid zinc Mar 20, 2019, 1:49 AM

#

but i don't know that means instanced properties

#

since instanced properties is a different thing from simple GPU instancing

#

i wouldn't be surprised if instanced properties isn't supported yet

#

it's pretty basic atm

quaint grotto Mar 20, 2019, 1:53 AM

#

cannot map expression to vs_5_0 instruction set

what does this mean ?

#

    v2f vert (appdata_base v) {        
            v2f i;
            i.normal = v.normal;
            v.vertex =  tex2D(_HeightMap, v.texcoord.xy);
            i.vertClipPos = UnityObjectToClipPos(v.vertex);
    }

this is my code

#

it doesn't seem to appreciate tex2D =/ dont understand why

frigid zinc Mar 20, 2019, 1:54 AM

#

did you mean to assign to v.vertex instead of i.vertex?

quaint grotto Mar 20, 2019, 1:54 AM

#

oh shit

#

uh actually i dont know

frigid zinc Mar 20, 2019, 1:55 AM

#

i don't know either, why i asked lol

quaint grotto Mar 20, 2019, 1:55 AM

#

im wanting to displace vertices by my height map

#

my frag doesn't do anything yet i just want to see the mesh verts moving

#

unity's sample code adjusts the vertex on v

      void vert (inout appdata_full v) {
          v.vertex.xyz += v.normal * _Amount;
      }```

#

so i just followed suit

frigid zinc Mar 20, 2019, 1:56 AM

#

i think that's fine

#

but i notice the function doesn't return anything

#

you have a v2f return type

#

so you should be returning i

quaint grotto Mar 20, 2019, 1:57 AM

#

oh i just manually wrote it in here it returns i

frigid zinc Mar 20, 2019, 1:57 AM

#

this is someone else's very simple vertex displacement

#

VertexOutput vert (VertexInput v) {
    VertexOutput o = (VertexOutput)0;           
        v.vertex.y += 10f;                       //here we edit the vertex
        o.pos = mul(UNITY_MATRIX_MVP, v.vertex);
        return o;
}

#

so yean not much different, just not using a texture

quaint grotto Mar 20, 2019, 1:58 AM

#

thing is:

            v2f i;
            i.normal = v.normal;
            //v.vertex =  tex2D(_HeightMap, v.texcoord.xy);
            i.vertClipPos = UnityObjectToClipPos(v.vertex);

#

this compiled

#

so its the tex2D its not happy with

#

cannot map expression to vs_5_0 instruction set when i try to use it

frigid zinc Mar 20, 2019, 1:59 AM

#

I've never heard of that error before

quaint grotto Mar 20, 2019, 1:59 AM

#

nor me

frigid zinc Mar 20, 2019, 2:00 AM

#

may need to change your #pragma target

#

what do you have it set to

#

try 3.0 or greater

quaint grotto Mar 20, 2019, 2:00 AM

#

tex2dlod works =/

#

but doesnt actually do anything

frigid zinc Mar 20, 2019, 2:01 AM

#

The tex2D function is only allowed in the fragment shader. It cannot be used in the vertex shader or any other shader stage.

#

guess that's why

#


You must use tex2Dlod in the vertex shader. ```

quaint grotto Mar 20, 2019, 2:02 AM

#

right so lod with x,y,0,0 im guessing

frigid zinc Mar 20, 2019, 2:02 AM

#

tex2Dlod(_SnowTrackTex, float4(vertex.texcoord.xy, 0.0, 0.0));

#

TIL hehe

#

That last zero is the mip level. If you change that to a 1.0 or 2.0 you'd use the first or second mip instead, assuming your texture has mip maps.

quaint grotto Mar 20, 2019, 2:03 AM

#

well at least it compiles now =/

foggy falcon Mar 20, 2019, 2:04 AM

#

hmm, disassembly of the shader seems to indcate it does create a CBUFFER, but I'm not sure if it's MaterialPropertyBlock compatible:

Constant Buffer "UnityPerMaterial" (32 bytes) on slot 0 {
  Vector4 Color_B907CECB at 0
  Vector2 Vector2_9610BD8D at 16
}

frigid zinc Mar 20, 2019, 2:04 AM

#

it would be nice if they automated that

#

but i guess the only way to really know is to test it

quaint grotto Mar 20, 2019, 2:12 AM

#

    v2f vert (appdata_base v) {
        
            v2f i;
            i.normal = v.normal;
            v.vertex.y +=  tex2Dlod(_HeightMap, float4(v.texcoord.xy,0,0)).r;
            i.vertClipPos = UnityObjectToClipPos(v.vertex);
            return i;
    }

Am i missing something here because this does not change the vertex positions at all

#

if i do v.vertex.y += someNum; it works fine

#

and i tested the image pixels in c# they do vary so it should be showing varying in vertices

frigid zinc Mar 20, 2019, 2:20 AM

#

it's going to be a value from 0.0 to 1.0

#

so at most it would be 1.0 which may simply be too small

#

try multiplying it by a value to scale the effect up

#

.r * 10.0

#

or something

#

(or better yet make it a slider so you can adjust it)

quaint grotto Mar 20, 2019, 2:26 AM

#

well the image isn't 0 to 1 is there no way to preserve the true numbers

#

the map has the literal height positions

frigid zinc Mar 20, 2019, 2:27 AM

#

i'm not sure what you mean 'there's no way to preserve true numbers'

#

any channel can have floating point values from 0.0 to 1.0

#

most textures are 8 bit per channel

#

which means 256 levels between 0.0 and 1.0

#

it's effectively 0 to 255

#

if expressed as integers

quaint grotto Mar 20, 2019, 2:30 AM

#

my texture isn't [0,1] on each channel they range with negative numbers

#

so i want to put the true value to my vertex y not [0,1] * scale

frigid zinc Mar 20, 2019, 2:31 AM

#

i'm not sure how a texture can have a negative number in it

quaint grotto Mar 20, 2019, 2:32 AM

#

RGBAFloat format

#

they are just float arrays

#

ultimately

frigid zinc Mar 20, 2019, 2:33 AM

#

ok i see

quaint grotto Mar 20, 2019, 2:33 AM

#

though even with * scale assuming its 0,1 its just moving everything up equally

frigid zinc Mar 20, 2019, 2:33 AM

#

then i don't know, other than maybe that sampler can't handle float textures

#

maybe there's another sampler function specific to that type

quaint grotto Mar 20, 2019, 2:35 AM

#

hm

frigid zinc Mar 20, 2019, 2:35 AM

#

i'd maybe make a debug

#

which is easier said than done

#

debugging shaders is very hard

#

but i'd try to downscale your values into the 0.0-1.0 range so you can plot them as colors on a surface

#

and see if you're even getting your values from that texture

#

because right now it sounds like you're not

#

if it's supposed to be getting values of that magnitude

#

I've never made a shader that used a float texture

#

so i have no experience with how that's done

quaint grotto Mar 20, 2019, 2:38 AM

#

hm maybe, but i will lose a lot of data doing that

frigid zinc Mar 20, 2019, 2:39 AM

#

yes i mean just for debug purposes

#

if it comes out a solid color

#

you know something is wrong with the sampling

quaint grotto Mar 20, 2019, 2:39 AM

#

well im not losing the data in the image so ive ruled that out at least

📎 unknown.png

frigid zinc Mar 20, 2019, 2:39 AM

#

but if you get a pattern roughly analogous to what the input was, (but compressed), then you know the sampling is okay.

quaint grotto Mar 20, 2019, 2:55 AM

#

@frigid zinc just tried it with an image of (0,1) ranges

#

still doesnt work

frigid zinc Mar 20, 2019, 3:34 AM

#

no idea then

#

this is standard pipeline?

quaint grotto Mar 20, 2019, 3:44 AM

#

regular unlit shader

#

@frigid zinc you're welcome to try

📎 Displacement.shader

#

use some ordinary height map on a nicely subdivided mesh

frigid zinc Mar 20, 2019, 3:45 AM

#

will see what I can do

#

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

Imgur

#

works like a charm without me changing anything

quaint grotto Mar 20, 2019, 3:46 AM

#

da fffffck

frigid zinc Mar 20, 2019, 3:46 AM

#

that was a plane before I put a texture on it

quaint grotto Mar 20, 2019, 3:47 AM

#

can you show me the height image you're using

frigid zinc Mar 20, 2019, 3:47 AM

#

https://i.imgur.com/WCZ53Ib.png

Imgur

#

no texture

#

I just grabbed something random

#

https://i.imgur.com/veYUf33.png

Imgur

quaint grotto Mar 20, 2019, 3:48 AM

#

oh it does work on unity's plane but not my blender plane

#

ok so its my mesh

#

🤔

frigid zinc Mar 20, 2019, 3:48 AM

#

https://i.imgur.com/4cZWFTJ.png

Imgur

#

https://i.imgur.com/Vx4QBVU.png

Imgur

#

maybe your mesh doesn't have read/write enabled

#

I think it has to be to use displacement

#

not sure tho

quaint grotto Mar 20, 2019, 3:49 AM

#

that might be why

📎 unknown.png

#

for some reason its crazy small

vocal narwhal Mar 20, 2019, 3:49 AM

#

I doubt you need r/w to enable displacement

#

r/w is for CPU

frigid zinc Mar 20, 2019, 3:50 AM

#

or maybe your mesh has no UVs?

#

pretty sure you'll need UVs to make it work (read/write doesn't seem to matter)

vocal narwhal Mar 20, 2019, 3:50 AM

#

uvs, normals.. could be lots of things

quaint grotto Mar 20, 2019, 3:52 AM

#

ah it works now

frigid zinc Mar 20, 2019, 4:00 AM

#

which was it, Uvs?

quaint grotto Mar 20, 2019, 4:00 AM

#

not sure i just re-exported and it worked

frigid zinc Mar 20, 2019, 4:00 AM

#

heh well, good enough I guess

quaint grotto Mar 20, 2019, 4:03 AM

#

material set texture allows texture2d right ?

#

the thumbnail in the inspector just shows black even though when i saved it to file it is showing correctly

frigid zinc Mar 20, 2019, 4:03 AM

#

should

#

that's the floating point texture? may not thumbnail well, I don't know

#

i don't even know how to make a floating point texture lol

quaint grotto Mar 20, 2019, 4:04 AM

#

_displacement = new Texture2D(N, N, TextureFormat.RGBAFloat, false);

#

like that lol

frigid zinc Mar 20, 2019, 4:04 AM

#

well i meant as an asset

quaint grotto Mar 20, 2019, 4:05 AM

#

oh

#

i dunno i never use engine tools i just do it all in c#

frigid zinc Mar 20, 2019, 4:05 AM

#

photoshop does have 32 bit per channel format

#

I've never used it though

#

i wonder if it's floating point

#

i think so, it's only giving me a few save options lol

#

https://i.imgur.com/enEVgn8.png

Imgur

#

will try intel's DDS

#

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

Imgur

#

yeah that will do the trick

#

see what unity says about it lol

quaint grotto Mar 20, 2019, 4:07 AM

#

so its RGBA reversed?

frigid zinc Mar 20, 2019, 4:08 AM

#

for DDS it seems

#

i dunno really

quaint grotto Mar 20, 2019, 4:08 AM

#

im hellish confused lol

#

i presumed if i set it to rgbafloat it would preserve the data in the shader too

frigid zinc Mar 20, 2019, 4:09 AM

#

https://i.imgur.com/69SFOaN.png

#

yeah see unity is not even making a thumbnail

#

but still says RGBA

#

they must swizzle it for uniformity

#

https://i.imgur.com/2U0pEcG.png

Imgur

#

i dunno tho

#

shaders don't seem to understand that format at all

#

everything is just black

#

i tried the 32 bit per channel

#

let me try 16 bit per channel

#

unity doesn't support that one

quaint grotto Mar 20, 2019, 4:13 AM

#

yeh im getting just black too and my mesh is just disappearing to i assume all zero

#

though it shouldnt because im only adjusting the y value

frigid zinc Mar 20, 2019, 4:14 AM

#

i dunno i'm starting to wonder if unity supports floating point textures like this

#

https://forum.unity.com/threads/no-floating-point-texture-support.503790/

Unity Forum

No floating point texture support?

I am using a texture of type RGBAFloat, which I initialize with setPixels.

I expected floating point precision to be preserved as setPixels takes an...

#

doh

#

Is _MainTex's sampler declared as a sampler2D_float?

#

so there is a special sampler

#

but is there a sampler2d_float_LOD

#

or sampler2D_LOD_FLoat?

quaint grotto Mar 20, 2019, 4:17 AM

#

hmm this guy says
I used a RenderTexture of type RGBAFloat today, to get the full precision of the Depth Texture

#

maybe i need to use render texture not texture 2d =/

#

otherwise i have on idea whats going wrong

frigid zinc Mar 20, 2019, 4:19 AM

#

oh wait i'm getting sampler and tex2d mixed up

#

https://i.imgur.com/uZLc2A6.png

Imgur

#

it's this, needs to be sampler2D_float

#

not sampler2D

#

then tex2dlod should be able to read it as a float

quaint grotto Mar 20, 2019, 4:21 AM

#

tried that

#

its a pain that i cant do it in pixel shader

#

maybe i should give it something else instead of a direct texture2d here:
_renderer.sharedMaterial.SetTexture("_MainTex", _t.displacement);

frigid zinc Mar 20, 2019, 4:26 AM

#

yeah i dunno, i'm totally winging it

quaint grotto Mar 20, 2019, 4:28 AM

#

lol 😛

frigid zinc Mar 20, 2019, 4:37 AM

#

i can really find very, very little about people using floating point textures in shaders

#

it's like it nearly doesn't exist

#

https://answers.unity.com/questions/1218018/how-to-force-shader-to-use-high-precision-floats-o.html

How to force shader to use high-precision floats on mobile? - Unit...

Unity is the ultimate game development platform. Use Unity to build high-quality 3D and 2D games, deploy them across mobile, desktop, VR/AR, consoles or the Web, and connect with loyal and enthusiastic players and customers.

#

this is really the only example of it I've found so far

#

and they seem to indicate it 'just works' but having problems on some phones

#

i don't see anything magical they did

quaint grotto Mar 20, 2019, 4:41 AM

#

well - no one cares about phones anyway

#

hm see when i manually put the file it shows the thumbnail

#

if i do it in code it shows black

#

it must be losing the data or something

vocal narwhal Mar 20, 2019, 4:46 AM

#

I assume you are Applying the pixels?

quaint grotto Mar 20, 2019, 4:48 AM

#

huh ? no im just using SetTexture()

#

every frame

vocal narwhal Mar 20, 2019, 4:48 AM

#

I mean when you create the Texture2D

quaint grotto Mar 20, 2019, 4:48 AM

#

oh i use SetPixel()

vocal narwhal Mar 20, 2019, 4:48 AM

#

and then Apply()?

quaint grotto Mar 20, 2019, 4:48 AM

#

seems to save the data to it

#

no ? didnt seem to need to as the data was present when i ran through each pixel

vocal narwhal Mar 20, 2019, 4:49 AM

#

Use Apply

quaint grotto Mar 20, 2019, 4:49 AM

#

what does it do

vocal narwhal Mar 20, 2019, 4:50 AM

#

https://docs.unity3d.com/ScriptReference/Texture2D.Apply.html

#

it will show you the texture on the CPU

#

otherwise it's GPU only

#

as far as I understand

#

I'm not certain though, either way it should make the preview work

quaint grotto Mar 20, 2019, 4:52 AM

#

😮

#

why did that work even though when i ran through the data it showed the values correctly

📎 capture.gif

#

at least it works now

#

@vocal narwhal

#

thanks

vocal narwhal Mar 20, 2019, 4:54 AM

#

Actually, without calling Apply the pixels are not even pushed to the GPU

#

good to see it's working 😃

quaint grotto Mar 20, 2019, 4:57 AM

#

what about graphics copy texture

#

it says Alternatively, if you don't need to access the pixels on the CPU, you could use Graphics.CopyTexture for fast GPU-side texture data copies.

#

but im confused on the differences at this point

vocal narwhal Mar 20, 2019, 4:58 AM

#

can only copy one texture to another

quaint grotto Mar 20, 2019, 4:58 AM

#

oh so graphics apply is a shader doing the copying ?

frigid zinc Mar 20, 2019, 4:59 AM

#

ohi thought you had a texture

#

i didn't realize you were generating it on the fly heh

quaint grotto Mar 20, 2019, 5:00 AM

#

ah lol

frigid zinc Mar 20, 2019, 5:00 AM

#

but I wouldn't know about 'apply' anyway

vocal narwhal Mar 20, 2019, 5:00 AM

#

Texture2D.Apply uploads the changed pixels to the graphics card, I don't know the implementation, it's external

frigid zinc Mar 20, 2019, 5:00 AM

#

I've never generated a texture at runtime either

quaint grotto Mar 20, 2019, 5:00 AM

#

is there a way to directly set a texture to a shader from a compute shader?

#

as i plan to move all of this to compute shaders

vocal narwhal Mar 20, 2019, 5:00 AM

#

I imagine so but I've not done it before 🤷

frigid zinc Mar 20, 2019, 5:00 AM

#

yeah i found a ton about that when searching

vocal narwhal Mar 20, 2019, 5:01 AM

#

like you could blit with a material and write whatever you want with a shader (I'm thinking ComputeBuffer, ComputeShader is different, never mind)

frigid zinc Mar 20, 2019, 5:01 AM

#

was pretty much all people talked about in reference to floating point textures

quaint grotto Mar 20, 2019, 5:01 AM

#

even with 256 dimensions ive got lag on cpu lol

vocal narwhal Mar 20, 2019, 5:01 AM

#

but I'm not sure if that's the best way

quaint grotto Mar 20, 2019, 5:11 AM

#

hm i see

#

yeh this stuff is a bit confusing

#

would be nice if unity made a more clear explanation of it really

uncut karma Mar 20, 2019, 5:23 AM

#

is there a way to directly set a texture to a shader from a compute shader? @quaint grotto you can have a compute shader write into a RWTexture2D which other materials could use as a Texture2D and sample from, if that's what you're askin

quaint grotto Mar 20, 2019, 5:24 AM

#

but does that still require the cpu to push it across @uncut karma

uncut karma Mar 20, 2019, 5:24 AM

#

not if the logic happens in compute, then its always GPU side

quaint grotto Mar 20, 2019, 5:24 AM

#

so how do you actually give that texture2d to the shader on the material from the compute?

uncut karma Mar 20, 2019, 5:25 AM

#

if you have some parameters you'd like the compute shader to use from CPU side they could be in a constant buffer array or StructuredBuffer (compute buffer) of whatever custom struct needed

quaint grotto Mar 20, 2019, 5:25 AM

#

because my cpu doesn't need to know about any of this once i move it all to compute

uncut karma Mar 20, 2019, 5:25 AM

#

you'd use a RenderTargetIdentifier most likely

quaint grotto Mar 20, 2019, 5:25 AM

#

well my time dependant algorithm just receives a time uniform but other than that not much else between them for cpu

uncut karma Mar 20, 2019, 5:26 AM

#

so the texture would be render texture that gets set on the compute shader, and then also set via material property block for any renderers/materials that need it (or set globally)

#

ah yea, _Time and all the other standard unity variables would be accessible in compute

quaint grotto Mar 20, 2019, 5:27 AM

#

oh actually i need the resulting texture from compute for physics calculations on cpu

uncut karma Mar 20, 2019, 5:27 AM

#

i see, depending on what information you need back, it could be a structured buffer

#

and then you'd use the compute buffer GetData and put it into an array or native array

quaint grotto Mar 20, 2019, 5:27 AM

#

but that still eliminates me having to push to my material from cpu

vocal narwhal Mar 20, 2019, 5:28 AM

#

it's still awful slow getting data back from the GPU

uncut karma Mar 20, 2019, 5:28 AM

#

which would be GPU to CPU but depending on size of array and bytes of each entry it can be quick

quaint grotto Mar 20, 2019, 5:28 AM

#

its slow but nlog(n) is slower on cpu 😛

uncut karma Mar 20, 2019, 5:28 AM

#

if its too slow you could do something where it updates in parts too

quaint grotto Mar 20, 2019, 5:29 AM

#

whats the main bottleneck for transferring to cpu ? the data size or the frequency of it ?

#

or both

uncut karma Mar 20, 2019, 5:30 AM

#

not sure technically, but i think its not as efficient as it could be & if i remember right it soundedl ike something Unity is aware of improving (possibly related to NativeArrays)

#

you may want to look into this https://docs.unity3d.com/ScriptReference/Rendering.AsyncGPUReadbackRequest.html (i havent tried it yet)

#

but it wouldnt stall, but just may have latency

quaint grotto Mar 20, 2019, 5:33 AM

#

i only need the send back to cpu as often as my physics tick rates

#

so at least thats a slight optimisation

#

i could probably get away with more since its water and not totally rigid

uncut karma Mar 20, 2019, 5:35 AM

#

could probably store the last result on cpu side and lerp to the latest to keep it smooth too

vocal narwhal Mar 20, 2019, 5:35 AM

#

I wonder if you could do a little GPU physics and return a tiny block of forces for an item sitting in it - it really depends what your needs are in that case though

#

seeing as it's buoyancy and not collisions it's a lot easy

#

it'd still only be viable for a few items I imagine

quaint grotto Mar 20, 2019, 5:39 AM

#

yeh, will see how i get on over the next week or two i still haven't added horizontal displacements anyway

tranquil zephyr Mar 20, 2019, 12:17 PM

#

Any suggestions on how I would go about rotating a direction vector (Want to rotate a normal)?

amber saffron Mar 20, 2019, 1:23 PM

#

Use a rotation matrix

tribal plume Mar 20, 2019, 4:09 PM

#

quaternions @tranquil zephyr

#

or rotation matrix if in shader

#

setting anti aliasing to 8 samples on a render texture doesn't seem to apply MSAA to it

#

I define the color and depth buffers for my camera with AA disabled, then blit it to a separate render texture with AA set to 8 samples, but the two depth textures look identical

frigid zinc Mar 20, 2019, 4:16 PM

#

funny, someone the other day was complaining they couldn't get rid of the AA on their depth texture

#

but they were using TAA

tribal plume Mar 20, 2019, 4:16 PM

#

lol

#

I enabled allowMSAA on the camera, but if I set the samples in the color / depth texture to non-zero values, it just renders black

dry island Mar 20, 2019, 5:27 PM

#

@fervent pelican @frigid zinc

old chat:
"you'd need a 'wavy hole' texture"

he would need a noise map and a radial gradient blended 😉

#

I can't find a cutout option in SG LWRP. Am I missing something?

frigid zinc Mar 20, 2019, 5:35 PM

#

😛

#

i like wavy hole better ;p

#

should be there, once you set a shader to use Transparency, the 'cutout' stuff is a checkbox in the settings below

dry island Mar 20, 2019, 5:45 PM

#

SG needs more parametric 3D map nodes like dent and cellular in 3dsmax.

#

Cutout is not there in SG.

#

Nor is sorting options which are there in the standard shader.

📎 unknown.png

frigid zinc Mar 20, 2019, 5:48 PM

#

hmm well i only tried in HDRP the other day

#

maybe LWRP doesn't have it, but that seems odd to me

#

let me look

dry island Mar 20, 2019, 5:49 PM

#

It is available in LWRP, but not in SG. (4.10.0)

frigid zinc Mar 20, 2019, 5:50 PM

#

yeah i mean in SG

#

was there for HDRP

dry island Mar 20, 2019, 5:51 PM

#

yeah these things are a bit silly. not helpful.

i.e. right now i want to try a cutout with blur to create a more fuzzy/soft cutout.

rotund tusk Mar 20, 2019, 5:52 PM

#

it would be up to the master node implementation to provide a "cutout" option like standard/built-in materials and that's on the render pipeline

dry island Mar 20, 2019, 5:52 PM

#

I am using the standard PBR master node for that.

frigid zinc Mar 20, 2019, 5:52 PM

#

https://i.imgur.com/R2tpt4x.png

Imgur

#

it does have a 'clip' threshold

rotund tusk Mar 20, 2019, 5:53 PM

#

that's on the render pipeline specific team to implement*

#

but ya just use alpha clip threshold

dry island Mar 20, 2019, 5:53 PM

#

Alpha clip only works when you choose transparent.

rotund tusk Mar 20, 2019, 5:53 PM

#

are you just using the default binding?

dry island Mar 20, 2019, 5:53 PM

#

and it only pushes the edge of the "alpha"

frigid zinc Mar 20, 2019, 5:54 PM

#

yeah well that seems to be the only option

rotund tusk Mar 20, 2019, 5:54 PM

#

default binding = the default int field widget shown in ceebee's image

dry island Mar 20, 2019, 5:54 PM

#

I know. But it is not cutout. When I switch to Transparent it creates sorting problems.

rotund tusk Mar 20, 2019, 5:55 PM

#

there's a bug with the default alpha clip field. you have to plug a vector1 node into it or some other edge in order for the ALPHA_CLIP keyword to get defined

#

so if you do that, you should be able to do opaque and alpha clipping

dry island Mar 20, 2019, 5:55 PM

#

wyatt I am not very familiar with this .

ok I will try that. Thanks

rotund tusk Mar 20, 2019, 5:55 PM

#

ya no worries. i will guide you haha

#

we should get that fixed

dry island Mar 20, 2019, 5:57 PM

#

ok looks like this fixed it. thanks. now to the more difficult part. making this blurry 😄

#

I will try diffuse/dither (edit, nope dither gave me alpha sorting issues...)

fervent pelican Mar 20, 2019, 6:08 PM

#

@dry island I found some noise map.

keen imp Mar 20, 2019, 7:07 PM

#

real time raytracing guys?

#

is it a thing you can implement as of now?

#

I'm talking metal katana

frigid zinc Mar 20, 2019, 7:22 PM

#

i already answered you in General

tribal plume Mar 20, 2019, 9:01 PM

#

anyway to render to 8 bit depth buffer?

#

precision only goes from 16 to 24 bits

quaint grotto Mar 20, 2019, 10:34 PM

#

any one familiar with atomic functions

#

if so can you ELI5 how they differ to normal functions

spare marsh Mar 20, 2019, 10:36 PM

#

nop

#

e

quaint grotto Mar 20, 2019, 10:58 PM

#

😢

sleek granite Mar 20, 2019, 10:59 PM

#

you can think of them usually as operations that are instantaneously & finish in one step. So say you're writing a kernel that spawns multiply threads, and those threads act on shared memory. With non-atomic operations you might alter this shared memory in one thread, but since the threads run concurrently the other threads don't know about this change.

#

If you use an atomic operation you might for example change a value in shared memory & all other threads will know about that change while they're still running

quaint grotto Mar 20, 2019, 11:06 PM

#

right so they are useful if/when altering data that all threads rely upon ?

sleek granite Mar 20, 2019, 11:06 PM

#

Yeah

#

a good example for that are pseudo random numbers on the GPU

quaint grotto Mar 20, 2019, 11:07 PM

#

but what if you change the value and some threads have already processed that particular value in memory and now its changed? does it have to do it again

sleek granite Mar 20, 2019, 11:09 PM

#

no, atomic operations are guaranteed to be executed before that happens

quaint grotto Mar 20, 2019, 11:19 PM

#

oh i see cool - thats good to know

#

thanks 😃

quaint grotto Mar 20, 2019, 11:51 PM

#

Arrays are not packed in HLSL by default. To avoid forcing the shader to take on ALU overhead for offset computations, every element in an array is stored in a four-component vector

so if i have [0]=1, [1] = 4.5f on C#
in compute, to get 4.5f i have to do [0].y ?

#

or have i misunderstood that

sand perch Mar 21, 2019, 1:28 AM

#

sorry if this question has already been answered, but is the new custom node (ShaderGraph) already here in the current 2019.1 / 2019.2 beta version ?
The changelog on github (https://github.com/Unity-Technologies/ScriptableRenderPipeline/blob/release/2019.1/com.unity.shadergraph/CHANGELOG.md) say it is, but it's in SG 5.8.0 and the latest I can get through the package manager is the 5.2.3 version.

broken field Mar 21, 2019, 1:29 AM

#

Show preview packages?

sand perch Mar 21, 2019, 1:29 AM

#

same thing

broken field Mar 21, 2019, 1:29 AM

#

Your version of unity is?

#

some packages are only visible to some versions due to compatibility.

sand perch Mar 21, 2019, 1:31 AM

#

The latest that I know of, I tried 2019.1b8 and 2019.2a9

broken field Mar 21, 2019, 1:31 AM

#

I can only assume it's not updating package manager's list

#

or something not very helpful to you :P

#

( I am on 2019.1 beta 8 with 5.10 )

#

..and yes function node is available in 5.8 and above

sand perch Mar 21, 2019, 1:32 AM

#

is there a way to bypass it by playing in the manifest.json ?

broken field Mar 21, 2019, 1:32 AM

#

I no longer meddle with the manifest

#

or do I? I can't remember

#

I will call the genie

#

@shadow krakennto wherefore art thou?

#

well lame

sand perch Mar 21, 2019, 1:33 AM

#

well thanks for trying to help 😃

#

well a few more info,
my 2019.1 install is stuck on LWRP 5.6.1 package and says it's up to date
my 2019.2 install is stuck on LWRP 5.2.3 package and says it's up to date

Both installs are fresh from tonight.

#

Both projects are empty, created from "LWRP" template

tribal plume Mar 21, 2019, 1:40 AM

#

does pp stack have gaussian blur?

sand perch Mar 21, 2019, 1:40 AM

#

and in both project, I get this error when I open it
"Failed reading from: '50/50c60386aa2616bbcc444ba0bd47ec27.ghd'."

sand perch Mar 21, 2019, 2:04 AM

#

is it possible that the server that provides the latests unity packages is down ?

frigid zinc Mar 21, 2019, 2:06 AM

#

no

#

what makes you say it's 'stuck'

sand perch Mar 21, 2019, 2:10 AM

#

ok my bad I feel quite stupid right now;
I didn't see that you could expand the thing next to the package; I was only looking at the bottom right button that says "Up to date"

#

📎 unknown.png

#

📎 unknown.png

#

anyway it,s a bit weird, it says "up to date" even though I can expand then click and select 5.10.0

📎 unknown.png

frigid zinc Mar 21, 2019, 2:14 AM

#

don't feel bad. I couldn't find that down there last night either 😦

#

i hate when they move UI stuff on you after you learn where it is lol

#

well i think the newer ones are still considered 'unapproved'

#

risky to use

quaint grotto Mar 21, 2019, 2:15 AM

#

the ui still sucks even for 2019 i mean come on even blender is getting a ui upgrade

#

its got that windows xp vibe

frigid zinc Mar 21, 2019, 2:18 AM

#

well new UI is being worked on

#

i just don't like buttons moving around willy-nilly

quaint grotto Mar 21, 2019, 2:19 AM

#

are screeshots of the new ui out ?

#

though i bet we need pro licence or something

frigid zinc Mar 21, 2019, 2:19 AM

#

oh yeah i figured you had seen

#

no will be default when released

quaint grotto Mar 21, 2019, 2:20 AM

#

yay

frigid zinc Mar 21, 2019, 2:20 AM

#

sometime with 2019

#

but still no dark mode 😛

quaint grotto Mar 21, 2019, 2:20 AM

#

ah okay so beta 2019 until 2024 then maybe its released 😛

vocal narwhal Mar 21, 2019, 2:20 AM

#

https://forum.unity.com/threads/second-editor-theme-iteration.635344/

quaint grotto Mar 21, 2019, 2:20 AM

#

we all know how to get dark mode anyway 😉

#

we are programmers after all

frigid zinc Mar 21, 2019, 2:21 AM

#

yeah there it is, i couldn't find it

quaint grotto Mar 21, 2019, 2:21 AM

#

glad they ain't totally moving everything about just making it neater

frigid zinc Mar 21, 2019, 2:25 AM

#

i'm not a fan of how monochrome and flat it is

vocal narwhal Mar 21, 2019, 2:26 AM

#

I dislike the the dark background colour also being used as the input field colour, makes them seem related when one should fade away and the other be super important

lime kindle Mar 21, 2019, 2:26 AM

#

has anybody used the scene color node in shader graph for HDRP?

#

it just returns black for me

sand perch Mar 21, 2019, 2:29 AM

#

thanks @frigid zinc for your help earlier, I can now test the custom node in shadergraph

#

it's working once you get the UI stuff 😃

#

however I'm so sad they totally removed the C# way of doing custom nodes.
I mean, how is this supposed to replace everything I did with my C# nodes ? custom master nodes ? custom UI for my nodes ?

📎 unknown.png

frigid zinc Mar 21, 2019, 2:33 AM

#

well, i think the general consensus is you shouldn't be doing custom UIs, and anything code-wise should probably be done in the shader code itself.

#

but it's early

#

stuff could morph once again before it's all said and done

vocal narwhal Mar 21, 2019, 2:33 AM

#

I live for custom UI so that hurts

#

I hope they introduce an API just for that really

frigid zinc Mar 21, 2019, 2:33 AM

#

yeah i can get that, especially since editor UI is a thing in unity

sand perch Mar 21, 2019, 2:35 AM

#

yeah, an example is I got an integer in the UI but I want to apply a pow() before I pass it to my shader so I can remap it and it's much easier to use; am I supposed to put the pow() in the shader graph or code instead ? what a waste of performance !

frigid zinc Mar 21, 2019, 2:36 AM

#

well maybe if they see more examples like that it will motivate them to do something

#

but how would that work once the shader is out of shadergraph and in the material editor

#

does that type of thing still work? I was never able to try it myself

#

if it doesn't, that may have been their concern

sand perch Mar 21, 2019, 2:39 AM

#

well it can work, it just has to be serialized in the material after the pow()

#

worst case you can still do a custom shader (Edit: custom shader UI) and it'll work

#

and something that bothers me is, they use custom stuff in their own node so they know it's useful

#

look at that

📎 unknown.png

frigid zinc Mar 21, 2019, 2:41 AM

#

custom UI you mean

#

well yeah i am not surprised hehe

sand perch Mar 21, 2019, 2:41 AM

#

they have custom UI all over the place, but we can't use it anymore

#

anyway I'll stop the rant :p

#

but like you said, I hope they'll see the light and walk in the custom-node-for-all path !

mossy smelt Mar 21, 2019, 4:08 AM

#

my fisrt shaders, didin't know to leave blank 2d texture nodes, and forogt to add gpu instancing nodes, but I think I'm getting addicted to shaders

#

📎 unknown.png

sand perch Mar 21, 2019, 5:08 AM

#

congratz @mossy smelt ! Looks cool !

mossy smelt Mar 21, 2019, 5:11 AM

#

@sand perch thanks ph!

grand jolt Mar 21, 2019, 1:13 PM

#

Hi,
I'm trying to set shader graph exposedProperty using Shader.SetGlobalVector in order to have the property set to all materials using the shader but it does not works. Is it possible to set a property value globally ?

still carbon Mar 21, 2019, 1:50 PM

#

a property you set globally shouldn't be exposed in editor i believe?

grand jolt Mar 21, 2019, 1:51 PM

#

In this video the person does expose the property and it works for him.

#

https://www.youtube.com/watch?time_continue=737&v=sYM0ys-X0J0

YouTube

Omar Sanitago

Unity 2018.3 Shader Graph Toon Shader

Use Unity 2018.3 Shader Graph in the lightweight render pipeline to make a toon shader graph (cell shader graph). That is what I go over in this tutorial vid...

▶ Play video

sand perch Mar 21, 2019, 2:49 PM

#

FYI I created a poll to see how many people were interested in the 2018.x node API and would like to have some similar features in 2019.x. I can't be the only one, so please vote !
https://forum.unity.com/threads/2019-1-shadergraph-custom-nodes-poll-please-vote.648454/

Unity Forum

2019.1 ShaderGraph custom nodes (poll, please vote !)

(I hope this is the right place to set this kind of poll)

As many of you probably know, in 2019.1b, Unity has changed the ShaderGraph API and how...

tribal plume Mar 21, 2019, 3:39 PM

#

any way to get an anti aliased depth map?

#

one that matches the color buffer

stone shard Mar 21, 2019, 4:16 PM

#

hi, i'm wondering if anyone here might know a solution to this. In a handheld AR app, outdoors, i want the video feed to be in the foreground, and cutout sky pixels so i can render my own far distance landscape and sky graphics. Presently I'm rendering the ar camera to a texture, and use a separate camera to render that as a raw image onto the screen. Now (i think) i just need some kind of histogram controls to identify sky pixels and make them disappear. Suggestions?

tidal fjord Mar 21, 2019, 4:59 PM

#

@stone shard To identify the sky in a photo.. sounds like a tough job for machine learning. I don't think you can get nice results with cutting a color range. Best bet might be to ditch the idea of a cutout in the camera feed and go for a nice fade from the camera feed to your skybox with spacial tracking and an inverted sphere

frigid zinc Mar 21, 2019, 5:00 PM

#

yeah you'd have to do your filming in front of a greenscreen

#

so you could replace the green with your procedural sky

#

or be very careful to have a perfectly blue sky and nothing else in your scene use blue

#

there's high-end video editing software that can use landmark tracking to do the cutout

#

but of course that means you have to have that kind of software, and process the video offline before doing the compositing

north rampart Mar 21, 2019, 6:38 PM

#

Hey guys! I'm trying to convert some shaders that were used by particles with vertex streams using ShaderGraph, the thing here is that I'm not entirely sure how to approach the declaration of the attributes on the generated code.
Anyone knows how can I ensure that the streams match on my shader?

stone shard Mar 21, 2019, 8:27 PM

#

Thanks. @outer lintelebee i need to do this at runtime, outdoors we'd need a greenscreen a mile wide! 😃 @tidal fjord it doesnt need to be perfect just a range of pixel to ignore that are in the "sky range", we'll assume the land/horizon is significantly different colors than the sky (eg not worry about foggy or snowing landscapes). Further thoughts?

#

i figured the user can just point the camera at the sky, drag a rectangle to define the pixels, then some kind of shader that matches similar pixels and doesnt render them ?

quaint grotto Mar 21, 2019, 9:22 PM

#

ARGBFloat Color render texture format, 32 bit floating point per channel. does this mean the alpha channel is now under .x ?

frigid zinc Mar 21, 2019, 9:24 PM

#

where do you see that stated?

#

is it inside unity or in an outside application?

quaint grotto Mar 21, 2019, 9:25 PM

#

unity doc

#

https://docs.unity3d.com/ScriptReference/RenderTextureFormat.ARGBFloat.html

#

i presume it means alpha channel is the first channel but i dunno

frigid zinc Mar 21, 2019, 9:26 PM

#

yeah I think the page makes it clear

quaint grotto Mar 21, 2019, 9:26 PM

#

not really lol regarding which channel is alpha

#

unless i take the name to be telling me so

frigid zinc Mar 21, 2019, 9:26 PM

#

that's how it's stored in memory

#

but I don't know that's necessarily how you access it

#

i was under the impression unity normalized all textures to RGBA

quaint grotto Mar 21, 2019, 9:27 PM

#

well thats what i don't know for sure

#

i can't find much info on this

frigid zinc Mar 21, 2019, 9:28 PM

#

if you're working in a shader

#

best to just use rgba instead of xyzw

#

then there's no room for confusion

quaint grotto Mar 21, 2019, 9:28 PM

#

but then is .a pointing to .x ?

#

its kinda screwing with my head

frigid zinc Mar 21, 2019, 9:28 PM

#

don't know, don't care. you just know you'll get .a 😃

#

no matter how it's stored

#

i would like to see a definitive answer though

#

i have a feeling it's one of those things you'd have to test yourself

quaint grotto Mar 21, 2019, 9:30 PM

#

yeah i guess, just found it odd it was named ARGB to start with

#

like i guess its important but i dont know why

frigid zinc Mar 21, 2019, 9:31 PM

#

because that's how it's stored in memory

#

and it was video card mfg who defined all these formats

#

we're just living in their world 😛

quaint grotto Mar 21, 2019, 9:32 PM

#

fuck those guys and their confusing designs 😄

frigid zinc Mar 21, 2019, 9:32 PM

#

must make the cards run faster to be arranged that way

#

🤷

quaint grotto Mar 21, 2019, 9:33 PM

#

might be less complicated if i just use a 2d float array over textures perhaps

#

but i dont know which is more performant on a compute shader

#

i presume texture look ups are slower than array access?

frigid zinc Mar 21, 2019, 9:35 PM

#

i dunno

quaint grotto Mar 21, 2019, 10:39 PM

#

is there no "get" texture method from compute shaders =/

quaint grotto Mar 22, 2019, 1:18 AM

#

getting this error: undeclared identifier 'Process' at kernel Process

https://hatebin.com/avkljgwqzc

Any idea why?

#

nevermind

#

solved it

frigid zinc Mar 22, 2019, 2:22 AM

#

ok this is a dumb shaderforge question, so I don't know if anyone will know

#

but I keep seeing node images like this:

#

https://i.imgur.com/d84mCUl.png

Imgur

#

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

Imgur

#

but my shaderforge window is like this

#

so how are they flipping everything horizontally so it goes right to left?

quaint grotto Mar 22, 2019, 2:26 AM

#

old shader forge versions were right to left

#

then she changed it to left to right

#

@frigid zinc

#

no idea if they left in the option to switch it back though

frigid zinc Mar 22, 2019, 2:27 AM

#

oh ok

#

yeah I looked through settings, didn't see anything. I was just wondering why some were that way 😃

quaint grotto Mar 22, 2019, 2:32 AM

#

im pretty sure the original creator is on here

#

or was...

frigid zinc Mar 22, 2019, 2:32 AM

#

yeah they are. but it's cool

#

was just curious

mental helm Mar 22, 2019, 5:56 AM

#

I made a pretty simple shader for sampling and combining textures using Texture2DArray and it seems to work just fine until i enter/exit play mode or save the unity proj. Then the textures disappear until i rebuild the texture array and set it to the material again. I have both the textures and the array set to dontdestroyonload. None of them go null. Is this due to Graphics. CopyTexture just operating on the GPU or something?

ornate blade Mar 22, 2019, 5:58 AM

#

if you are setting the textures via a custom editor/scriptable object, you may need to set the editor as dirty, or the variables as serializable

mental helm Mar 22, 2019, 6:35 AM

#

I'm not, just directly through a script they are marked as serializeable. It's just testing. But it does seem odd. The quad just becomes grey on play. If I build the array and assign it to the shader/material after that, it continues to show until I exit play or save again. Again, nothing becomes null. I thought I'd read that graphics.copytexture was a GPU operation or it copies to GPU and not cpu, which i assume is my issue, but idk how to fix that. I guess I could just simply rebuild it everytime the scene changes or on play/exit.

quaint grotto Mar 22, 2019, 6:39 AM

#

😮 yay it worked !

mental helm Mar 22, 2019, 6:40 AM

#

https://docs.unity3d.com/ScriptReference/Graphics.CopyTexture.html

Last paragraph there states that CopyTexture operates on GPU side data exclusively.

If my texture array has to be build at runtime i guess i can't keep that around between loads or saves, and just rebuild it as needed.

quaint grotto Mar 22, 2019, 6:40 AM

#

did you use .apply () afterwards?

#

@mental helm

#

thought not sure what your end goal is

mental helm Mar 22, 2019, 6:45 AM

#

I'm feeding the shader a texture2Darray of parts of a 2D character and "flattening" them on a quad. So i get diff clothes and customization with a single renderer and only loading the textures necessary.

That doc i linked says calling apply causes unpredictable results because it's not meant to be used together i think. Pretty sure apply is to be used with get and set pixel while copy texture is used with GPU side stuff only.

#

Like i said it all works and everything it just seems that the texture array created without saving it as an asset loses its textures on the GPU when loading. The references to textures and the array themselves stay within my script just fine and serialize and everything.

#

@quaint grotto
https://forum.unity.com/threads/how-to-make-texture2d-array-survive-into-next-scene.27067/

This post seems to reference the same thing but they solved it by making each texture dontdestroyonload. I've done then exact same thing but it still doesn't preserve the textures they just become grey

Unity Forum

How to make Texture2D array survive into next scene?

Hi.

I'm struggling with the image in my Texture2D array getting blank whenever I load a new scene. There is data in the array because the width,...

quaint grotto Mar 22, 2019, 6:55 AM

#

you say when loading ? do you mean when you change a game scene

#

i think but i might be wrong, declare in your shader your 2d array as uniform

mental helm Mar 22, 2019, 6:57 AM

#

I haven't tested with switching scenes when the game is running. I just simply built the array in the editor through script. If I save the scene or enter play mode it goes grey. If I build it again when playing, it works until i exit play mode.

quaint grotto Mar 22, 2019, 6:57 AM

#

sec let me check if thats the right keyward

mental helm Mar 22, 2019, 6:57 AM

#

Hmm. Tbh i made the shader in ShaderGraph. Can I do that through shadergraph? I guess i could just rewrite the shader myself

quaint grotto Mar 22, 2019, 6:59 AM

#

maybe just set it again on scene change

#

¯_(ツ)_/¯

mental helm Mar 22, 2019, 6:59 AM

#

Yeah worst case that's what I'll do. No big deal.

quaint grotto Mar 22, 2019, 6:59 AM

#

i think that would be better than using dont destroy on load

#

dont destroy on load is best for something like a singleton like a game manager

mental helm Mar 22, 2019, 7:01 AM

#

Yeah. I was really just trying to get it to work atm. It's weird though that the array doesn't become invalid. It still reports the correct number of textures and the sizes of textures and everything.

#

No errors or anything.

quaint grotto Mar 22, 2019, 7:02 AM

#

hm not sure

mental helm Mar 22, 2019, 7:05 AM

#

Thanks for the help! :)

quaint grotto Mar 22, 2019, 7:09 AM

#

didn't really help but np 😄

tranquil zephyr Mar 22, 2019, 10:38 AM

#

Anyone knows how to convert the sv_position in a frag function (I assume it's clip space?) to either world or, preferably, screen space (Either normalized or pixel position based is fine)?

#

Actually, I seem to be able to get the result I want just using sv_position itself. What I was aiming for was to set a property in the shader based on the x position of an UI object, and render everything on its left one color and everything on its right in a different color.

edgy star Mar 22, 2019, 12:39 PM

#

I have a weird question. I made a shader, partly putting it together from existing pieces and something I don't understand happened.
As far as I have seen, in general we make our vertex function return data we're interested in using. Then, our fragment function takes that data as an argument.
However, I was just cleaning up my code and I noticed that in one of my passes, the returning type of vertex function's doesn't match the fragment function's argument at all. And it works. Why does it work? What happens underneath?

Here's the code:

            #pragma vertex SimpleVert
            #pragma fragment Frag

My vertex function returns a float4:

            float4 SimpleVert(float4 v:POSITION) : POSITION{
                return UnityObjectToClipPos(v);
            }

... but my fragment function takes a v2f argument:

            float4 Frag (v2f i  ) : SV_Target
            {

                float2 uv = i.texcoord.xy;
                float4 color = _Color;

                return color;
            }

That v2f is a struct I used in my previous fragment function I no longer use. The struct goes like this:

            struct v2f
            {
                float4 vertex : SV_POSITION;
                float2 texcoord : TEXCOORD0;
                float4 screenUV : TEXCOORD1;
                float3 ray : TEXCOORD2;
                half3 orientation : TEXCOORD3;
            };

Again - why does it work? What exactly happens between vertex and fragment functions in the pipeline?

tranquil zephyr Mar 22, 2019, 12:57 PM

#

I'm not quite educated on this matter enough to give a confident answer, but my guess would be that it actually isn't giving the correct value.
If I'm correct, when the float4 is returned instead of an object, it's passed in memory as the first value on the offset at which the v2f object should start.
Since we're using C and objects aren't actually a thing, casting between types is simply a process of looking at the same offset in memory and looking ahead a certain amount of bytes.

So for example, if you had 4 bytes in memory starting at offset 0x0 with the following values:
0x0: 0001
0x1: 0001
0x2: 0000
0x3: 0000
And you were to look at a byte starting at offset 0, its value would be 0, but if you were to look at an int (Which uses 4 bytes) at the same address, you'd basically just look at the 4 bytes starting at that offset and treat them all as the same int.
That means that in the case above, your int would contain the binary value 00010001 (or the integer value 17), even though when looking at the same offset as a short would return 1.

In your case, that basically means that you're lucky it works since the first value in your v2f struct is a float4, and you're returning a float 4 from the vert function.
But the rest of the data in the v2f object would be garbage.

#

tl;dr, the returned value is not correct, you're basically returning only the first value in the v2f struct using the value you're returning.

#

And now for a question of my own!

Is anyone aware of a way to do shader replacement but instead of not rendering objects that don't match my tag, display them with their original shader?

edgy star Mar 22, 2019, 1:04 PM

#

@tranquil zephyr Ok, thanks for clarifying - I get it now. I just have one concern now. The variable in v2f I'm actually using in my fragment function is texcoord, which is not a float4, nor is the first variable in the struct.

#

So in theory it shouldn't get initialized properly.

#

Also, why does the SimpleVert have an argument? What gets passed there and how? I can see different vertex functions using different arguments, but I don't control what actually goes there. This data migration between functions is currently the most confusing part of shader programming for me.

#

I could imagine that those : SV_POSITION, : TEXCOORD, etc already fill those structs with proper data, but optionally passing arguments of specific types in the earlier functions in the pipeline lets me override some (or all) of the automatically initialized variables. Am I correct?

#

Also sorry for burying your question @tranquil zephyr . 😑

tranquil zephyr Mar 22, 2019, 1:22 PM

#

Oh, you're right, I didn't notice it was the second thing.
So maybe I'm wrong about the whole thing, but as I said, it's just a guess.

In your case, I think that might be related to the fact that the vert method is decorated with : POSITION at the end, which might be a cheat to telling it where to map on the created object?

edgy star Mar 22, 2019, 1:24 PM

#

But again there's a discrepancy - Vert is decorated with : POSITION, but the variable in use is decorated with : TEXCOORD0

tranquil zephyr Mar 22, 2019, 1:24 PM

#

About input values for vert, as far as I understand, there are some reserved words in the language that map certain values into the input object. POSITION in one of them.
So doing float4 v:POSITION as your parameter would be the same as doing
struct input
{
v : POSITION;
}

The Unity Manual seems to suggest that anyway, atleast for Surface shaders:
https://docs.unity3d.com/Manual/SL-SurfaceShaders.html
So I assume Vertex shaders would be the same way.

#

That's true. That's a part I still find confusing as well ¯_ツ_/¯

devout quarry Mar 22, 2019, 3:35 PM

#

I tried making a simple wave shader in hdrp

#

📎 unknown.png

#

but if you look closely I get these lines on the 'hill' of the wave

#

any guess why this is the case?

edgy star Mar 22, 2019, 3:47 PM

#

Looks like self-shadowing.

devout quarry Mar 22, 2019, 3:51 PM

#

how do I prevent it?

#

📎 unknown.png

#

this is what it looks like when I turn up wave height

broken field Mar 22, 2019, 3:52 PM

#

shadow bias options

#

you should generate a normal map for the surface as well each frame

#

doing so will improve the shadows

#

+also further improve shadows if used in forward+

#

(hdrp forward)

devout quarry Mar 22, 2019, 4:05 PM

#

will try, ty!

tranquil zephyr Mar 22, 2019, 4:05 PM

#

Is anyone aware of a way to do shader replacement but instead of not rendering objects that don't match my tag, display them with their original shader?

low lichen Mar 22, 2019, 4:18 PM

#

@broken field Speaking of generating a normal map, that's something I'm dealing with right now with my own water wave shader.

I'm displacing a tessellated quad based on a heightmap from a wave propagation simulation. I found a code snippet to generate normals from the heightmap, but I haven't figured out the right way to apply them in the vertex shader.

#

Here's what the generated normals look like:

📎 Unity_equpTd1bkh.png

#

How do I take that and apply it to the existing normal on each vertex?

broken field Mar 22, 2019, 4:51 PM

#

hey there is actually a node for converting height to normals in shadergraph

#

but how I did my water was to use partial derivatives

#

ddx and friends - allows me to sample the pixel next to the current, and the difference between will obviously be the angle

#

So I actually recommend a separate normals generation pass to generate a normal map, if this can't be done then probably can just use partials in vertex

#

if generating normals, use a 256 normal map so it stays inside gpu cache

#

(or, this isnt' going to be a bottleneck anyway tbh)

frigid zinc Mar 22, 2019, 5:05 PM

#

how do you know a 256pixel map will stay in the cache

#

i'm not familiar with that idea

devout quarry Mar 22, 2019, 5:41 PM

#

In shader forge there is like a depth blend node and in amplify it's called depth fade or something, is there something similar in shader graph?

frigid zinc Mar 22, 2019, 5:45 PM

#

probably not, right now Shadergraph seems to be sticking with the basics. And that kind of node is really a 'generated' thing, from available data and some math

#

it's basically doing some forumulas for you

#

you'd probably have to create a similar function yourself using the Scene Depth Node

#

https://docs.unity3d.com/Packages/com.unity.shadergraph@5.10/manual/Scene-Depth-Node.html

devout quarry Mar 22, 2019, 5:46 PM

#

okay ty

sand perch Mar 22, 2019, 6:06 PM

#

+1 with ceebee, it's 100% doable, I did a transparent light beam that fade out when it hits the camera or any geometry 😃

devout quarry Mar 22, 2019, 6:06 PM

#

tbh I know nothing about shader coding but I'm looking at shader forge source code, and together with the Unity API to create custom nodes I should be able to figure this out 😃

devout quarry Mar 22, 2019, 7:43 PM

#

📎 vpq0kDTKO2.mp4

#

I'm getting somewhere!

#

Alpha changes based on depth

mental sentinel Mar 22, 2019, 9:34 PM

#

do you guys know if there is a way to use mesh distance fields to do some water shoreline? I've seen this technique used in unreal here: https://80.lv/articles/cartoon-water-shader-in-ue4/

Cartoon Water Shader in UE4

Adam Homoki did a breakdown of his beautiful Cartoon Water Shader made in UE4: waterfall, waves, caustic effect, interaction, color, and more.

#

I know we can make SDF in unity (like raymarching) but I doubt we could use them like this

frigid zinc Mar 22, 2019, 9:41 PM

#

in the end everything is math, and math can be used in any engine

#

there's no reason that technique won't work in unity if it worked in unreal

#

i seem to recall someone showing off their thing to turn meshes into SDFs awhile back

mental sentinel Mar 22, 2019, 9:43 PM

#

lol, it's like saying "a screen is only an array of value"

frigid zinc Mar 22, 2019, 9:43 PM

#

so i know at least one person has done it already

mental sentinel Mar 22, 2019, 9:44 PM

#

haha ok ^^

frigid zinc Mar 22, 2019, 9:44 PM

#

well it's true 😛

#

but does unity have a built in SDF system, no

#

let me search back and see when ppl were talking about that

mental sentinel Mar 22, 2019, 9:45 PM

#

that's the difference with unreal right

#

thanks !

#

it looks so much better than using depth test for shoreline

frigid zinc Mar 22, 2019, 9:47 PM

#

yeah mostly it centered around this article:

#

https://developer.nvidia.com/gpugems/GPUGems3/gpugems3_ch34.html

NVIDIA Developer

GPU Gems

#

and this tutorial

#

https://www.alanzucconi.com/2016/07/01/signed-distance-functions/

Alan Zucconi

Volumetric Rendering: Signed Distance Functions - Alan Zucconi

This tutorial explains how to create complex 3D shapes in a volumetric shader, using signed distance functions. Unity tutorial and code provided.

mental sentinel Mar 22, 2019, 9:48 PM

#

already seen the article from Alan, it's a great introduction to SDF for sure

frigid zinc Mar 22, 2019, 9:48 PM

#

the GPUGems one is probably the most interesting since it deals with mapping arbitrary 3d models

#

probably very similar to what Unreal is doing

mental sentinel Mar 22, 2019, 9:49 PM

#

this is the reference from Unreal doc: https://docs.unrealengine.com/en-us/Engine/Rendering/LightingAndShadows/MeshDistanceFields

#

I guess so

#

thx for sharing this article, I don't think I'm good enough to try out an implementation, for such a small effect

frigid zinc Mar 22, 2019, 9:50 PM

#

yeah NP

#

i don't know if something already exsits

#

but i wouldn't be surprised if there was already a 3rd party signed field generator for models

#

or even if you could pull the SDF texture out of unreal and use it in unity

#

in the end it's just a texture

#

and pretty much useable in any application heh

mental sentinel Mar 22, 2019, 9:51 PM

#

haha clever ^^

frigid zinc Mar 22, 2019, 9:52 PM

#

https://github.com/armory3d/sdfgen

GitHub

armory3d/sdfgen

GPU-based SDF generator. Contribute to armory3d/sdfgen development by creating an account on GitHub.

#

seems Armory3D has one

mental sentinel Mar 22, 2019, 9:53 PM

#

sweeeet

fervent tinsel Mar 22, 2019, 10:12 PM

#

finally merged https://github.com/Unity-Technologies/ScriptableRenderPipeline/pull/3060

GitHub

Async Compilation for Preview Shaders by marctem · Pull Request #...

Purpose of this PR
Take advantage of async compilation for the preview shaders (no more "Compiling Shaders..." dialog!) and render previews only when necessary. Removes the ÜberShader so ...

foggy falcon Mar 22, 2019, 11:14 PM

#

someone at work mentioned the new VFX system can create SDFs from mesh data now

mental sentinel Mar 22, 2019, 11:44 PM

#

wooo shit this is a big improvement 😮

#

oh really @foggy falcon ? will check it out for sure if then

foggy falcon Mar 22, 2019, 11:46 PM

#

At least, it looks like that, certain VFX Blocks support SDFs so I'd assume there's a converter somewhere in there:

https://github.com/Unity-Technologies/ScriptableRenderPipeline/wiki/VFX-Blocks

GitHub

Unity-Technologies/ScriptableRenderPipeline

Scriptable Render Pipeline. Contribute to Unity-Technologies/ScriptableRenderPipeline development by creating an account on GitHub.

#

There's some SDFs in the samples but I'm not finding any specifics onto how they're made exactly:

https://github.com/Unity-Technologies/VisualEffectGraph-Samples

you're probably better off talking to the folks in #✨┃vfx-and-particles, I haven't messed with the VFX framework myself

GitHub

Unity-Technologies/VisualEffectGraph-Samples

Visual Effect Graph - Samples Project. Contribute to Unity-Technologies/VisualEffectGraph-Samples development by creating an account on GitHub.

mental sentinel Mar 23, 2019, 12:34 AM

#

thx !

quaint grotto Mar 23, 2019, 6:02 AM

#

(╯°□°）╯︵ ┻━┻

#

damn you unity

#

wasted me 4 hours from that shader bug

#

computeShader.SetVector does not inform you if it could not find the variable

devout quarry Mar 23, 2019, 10:39 AM

#

📎 unknown.png

#

'expected to be normalized screen coordinates'

#

what should I effectively put into this

#

the UV's of my model?

low lichen Mar 23, 2019, 1:10 PM

#

@devout quarry Screen coordinates are defined as 0,0 being bottom-left corner of the screen and 1,1 being the top-right.

broken field Mar 23, 2019, 3:05 PM

#

is this depth buffer normalized or raw

fervent tinsel Mar 23, 2019, 4:52 PM

#

@broken field if you talk about SG node on HDRP, it has options for that

#

📎 unknown.png

#

probably same with LWRP graphs, but mentioend HDRP as that's all I use it for

broken field Mar 23, 2019, 4:53 PM

#

Oh nice, I haven't got around to doing my water shader in HDRP yet (left it till HDRP matured) but it looks like it's doable now...

#

for depth fogging etc

#

I read that tess will get an overhaul in HDRP and it's pretty crappy at the moment?

#

I kind of need it for my water shader which I'll be porting from builtin (I prefer to do my own water shaders for obvious reasons, it's always better to control something like that in rendering)

fervent tinsel Mar 23, 2019, 4:57 PM

#

well, you can't do tessellation at all with SG atm

#

that's kinda issue if you need that for ocean effect

#

of course you could move a gradually tessellated water plane along with the camera today 😄

#

like, have denser grid near the camera that way

#

would need to move the ocean plane in steps then so the movement doesn't make it look more alive than it should be

#

I think I posted some simple graph for the depth effect here earlier

#

📎 unknown.png

#

📎 unknown.png

#

@broken field

broken field Mar 23, 2019, 5:04 PM

#

oh you sexy mare...

#

can I borrow that to start?

fervent tinsel Mar 23, 2019, 5:04 PM

#

of course

broken field Mar 23, 2019, 5:04 PM

#

thanks :)

fervent tinsel Mar 23, 2019, 5:04 PM

#

I posted that when someone asked how to do this

broken field Mar 23, 2019, 5:05 PM

#

that looks about right

#

I'll probably use it for foam as well