Artifacts | Official Unity Discord | Page 1

civic zealot Dec 9, 2022, 1:24 AM

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Can you select the texel validity scene view mode? Click on the "bug" button in the scene view toolbar

jolly cobalt Dec 9, 2022, 1:25 AM

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gimme a sec for that, but I do have a screenshot of the UV overlap https://cdn.discordapp.com/attachments/1033929408790155274/1050583562803482694/image.png

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texel validity

civic zealot Dec 9, 2022, 1:26 AM

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Can you rotate the camera so I can see the other side of the bedside table just to confirm

jolly cobalt Dec 9, 2022, 1:26 AM

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a little hard to see

civic zealot Dec 9, 2022, 1:26 AM

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Yeah I think I see what's going on

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So the red areas are invalid texels which means any ray bouncing off them can cause those artifacts

jolly cobalt Dec 9, 2022, 1:28 AM

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How can I fix that?

civic zealot Dec 9, 2022, 1:28 AM

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https://forum.unity.com/threads/faq-blocky-artifacts-appear-when-i-bake-a-scene-how-can-i-fix-them.951444/

Unity Forum

Official - [FAQ] Blocky artifacts appear when I bake a scene. How c...

Visual artifacts in baked lighting can occur for a number of reasons. These may commonly appear as unexpected dark or light patches, streaks or...

jolly cobalt Dec 9, 2022, 1:34 AM

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civic zealot https://forum.unity.com/threads/faq-blocky-artifacts-appear-when-i-bake-a-scene-...

So I can't fix this problem without editing the models it seems like

civic zealot Dec 9, 2022, 1:38 AM

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I would guess so

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The normals on that bedside table don't look right

jolly cobalt Dec 9, 2022, 1:39 AM

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i brought the bed model into blender and added the solidify modifier to it and that seems to fix it.. this would be way too time consuming to do in practice though

civic zealot Dec 9, 2022, 1:40 AM

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It depends on the models, it doesn't happen with everything

jolly cobalt Dec 9, 2022, 1:41 AM

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oh wait 🤦

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didn't mark the bed as static duh

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yeah, the texels are still invalid :/

civic zealot Dec 9, 2022, 1:41 AM

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It's the table you should fix

jolly cobalt Dec 9, 2022, 1:41 AM

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these are pre-made models i have, so i can't really edit them

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kenney assets i think

civic zealot Dec 9, 2022, 1:43 AM

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Then you can maybe tweak the backface tolerance

jolly cobalt Dec 9, 2022, 1:43 AM

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I thought that was only for realtime GI

civic zealot Dec 9, 2022, 1:44 AM

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Not at all

jolly cobalt Dec 9, 2022, 1:44 AM

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oh i misread

civic zealot Dec 9, 2022, 1:44 AM

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It applies to the lightmapper as well

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You'll need to increase it for the bed and anything that shows artifacts

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Or globally 🤷‍♂️

jolly cobalt Dec 9, 2022, 1:47 AM

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i changed the backface tolerance to 1.0 globally, didn't change anything

civic zealot Dec 9, 2022, 1:48 AM

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I suppose that if the only thing that texel "sees" is invalid it wouldn't help very much.

jolly cobalt Dec 9, 2022, 1:49 AM

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hm..

civic zealot Dec 9, 2022, 1:50 AM

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I would still recommend editing the models or making sure the scene is set up so your objects don't "see" backfaces

jolly cobalt Dec 9, 2022, 1:51 AM

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im going to try an asset from another pack real quick

civic zealot Dec 9, 2022, 1:51 AM

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What are your lighting setting btw?

jolly cobalt Dec 9, 2022, 1:51 AM

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HDRP, Very High Preset for Baked Lighting

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(well it was very high preset before i changed the backface tolerance)

civic zealot Dec 9, 2022, 1:52 AM

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Can you send a screenshot of the lighting window?

jolly cobalt Dec 9, 2022, 1:52 AM

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civic zealot Dec 9, 2022, 1:54 AM

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Ok thanks, just making sure the resolution is high enough

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Did you try the different assets?

jolly cobalt Dec 9, 2022, 1:55 AM

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baking rn

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this is strange, tree isn't being affected by the lighting. it is lightmap static

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its actually just entirely black

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civic zealot Dec 9, 2022, 2:00 AM

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What material is it using

jolly cobalt Dec 9, 2022, 2:00 AM

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HDRP/Lit

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same one as the floor

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floor is getting lit fine

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i mean, it is generating a baked lightmap.. but the lightmap has no light so its just pure black

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before and after clearing baked lighting

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is this normal for the albedo overlay?

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it's literally cutting them out

civic zealot Dec 9, 2022, 2:03 AM

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That's probably not what should be happening yeah

jolly cobalt Dec 9, 2022, 2:04 AM

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i've never gotten baked lighting to work, i must be cursed

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This makes no sense to me, why these models wouldn't be receiving any light

civic zealot Dec 9, 2022, 2:06 AM

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What kind of lights are you using?

jolly cobalt Dec 9, 2022, 2:06 AM

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its not just that tree

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baked spot lights

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im even blasting these models with directional light

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civic zealot Dec 9, 2022, 2:09 AM

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I... Dont understand what's going on here

jolly cobalt Dec 9, 2022, 2:09 AM

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i mean it looks cool at least

civic zealot Dec 9, 2022, 2:10 AM

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They don't really seem to be in the lightmap

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Can you go to the lighting window Baked Lightmaps tab

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And inspect the lightmap texture

jolly cobalt Dec 9, 2022, 2:11 AM

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hold on something different happened this time

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bake is still in progress but for some reason the tree's leaves are a different color

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the default cube is receiving light fine though..

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this was the final bake

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this is nonsensical

civic zealot Dec 9, 2022, 2:12 AM

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So if you just place your objects in a void then you can't bounce light off anything

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Can you change the light to mixed?

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Light(s)

jolly cobalt Dec 9, 2022, 2:14 AM

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i think i see whats happening? maybe?

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theres definitely supposed to be a checkerboard pattern on these objects

civic zealot Dec 9, 2022, 2:14 AM

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They're not in the lightmap

jolly cobalt Dec 9, 2022, 2:15 AM

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here's the preview of the lightmap for one of the trees

civic zealot Dec 9, 2022, 2:15 AM

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So they're only receiving indirect

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Had the bake finished when the trees were black?

jolly cobalt Dec 9, 2022, 2:16 AM

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yes

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weirdly they don't bake black anymore

civic zealot Dec 9, 2022, 2:16 AM

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Which version are you using

jolly cobalt Dec 9, 2022, 2:16 AM

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2020.3.41

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something interesting, when I changed the texel size i can see the colors of those low poly models changing

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mostly through different shades of grayish

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im gonna try a new scene

civic zealot Dec 9, 2022, 2:21 AM

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It would be useful to set up your scene in a way that works with baked / mixed lighting and try to add or remove elements one at a time

jolly cobalt Dec 9, 2022, 2:21 AM

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so im wondering if this a problem specific to these models too

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because when i go to the UV overlay, no checkerboard

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civic zealot Dec 9, 2022, 2:22 AM

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Do the objects have lightmap uvs generated?

jolly cobalt Dec 9, 2022, 2:22 AM

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How do I check

civic zealot Dec 9, 2022, 2:22 AM

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Go to the asset inspector

jolly cobalt Dec 9, 2022, 2:22 AM

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right

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click this?

civic zealot Dec 9, 2022, 2:22 AM

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Yes

jolly cobalt Dec 9, 2022, 2:23 AM

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ok yes that added the checkerboard

civic zealot Dec 9, 2022, 2:24 AM

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It should behave better with the lightmapper now

jolly cobalt Dec 9, 2022, 2:27 AM

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it does receive lighting now

civic zealot Dec 9, 2022, 2:28 AM

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Amazing

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Trees should also be fixed with that.

jolly cobalt Dec 9, 2022, 2:29 AM

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civic zealot Trees should also be fixed with that.

ill try that

civic zealot Dec 9, 2022, 2:29 AM

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As for the original question about texel validity: beware of the backfaces and use better (or edited) assets!

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It's getting late here, I'll check back tomorrow

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Hope things are a bit clearer now

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😅

jolly cobalt Dec 9, 2022, 2:30 AM

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i do want to ask one thing though, im not super experienced with baked lighting

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i heard in the source engine they have a special technique for baked lighting that works for small details that baked lighting usually can't capture, does unity have something like that?

civic zealot Dec 9, 2022, 2:35 AM

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What do you mean details? Intricate geometry?

jolly cobalt Dec 9, 2022, 2:35 AM

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yes because the scale of most levels will be massive so the lightmaps are generally spread over a large area

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i can look for the name of the system

civic zealot Dec 9, 2022, 2:37 AM

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Right. https://docs.unity3d.com/2020.3/Documentation/Manual/LightingGiUvs-GeneratingLightmappingUVs.html

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So again about UVs

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The scale they use will be used in the lightmapper to figure out their texel density

jolly cobalt Dec 9, 2022, 2:39 AM

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ok so if i want something with more detail, i change the scale?

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wait oh my god the generate lightmap fixed the bed

civic zealot Dec 9, 2022, 2:39 AM

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Increase the min lightmap resolution

jolly cobalt Dec 9, 2022, 2:40 AM

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civic zealot Increase the min lightmap resolution

I see max but not min, is this a per-object thing?

civic zealot Dec 9, 2022, 2:41 AM

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Yes in the asset importer under lightmap uvs

civic zealot Dec 9, 2022, 2:42 AM

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jolly cobalt wait oh my god the generate lightmap fixed the bed

That looks so different now 😂

jolly cobalt Dec 9, 2022, 2:43 AM

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yeah it looks really good, i've never gotten the baked lighting to actually work with anything before

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i guess it's because i haven't been using lightmap UVs this whole time

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civic zealot Dec 9, 2022, 2:44 AM

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Amazing, enjoy!

jolly cobalt Dec 9, 2022, 2:44 AM

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anyway to make those corners a bit more smooth? or is that something that's kind of unavoidable with low poly

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or maybe i just don't understand how light works lol, it feels off

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Thanks for all this, btw, game changing

civic zealot Dec 9, 2022, 2:46 AM

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Increase the antialiasing samples in the lightmap parameters

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Go to 16

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Then after that it's not aliasing coming from the lightmaps in all likelihood

jolly cobalt Dec 9, 2022, 2:48 AM

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i assume indirect bounces would probably clear those up slightly too

civic zealot Dec 9, 2022, 2:49 AM

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I don't think that's going to help with this particular issue

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I'm off, I'll check back tomorrow. Play around with baked lighting and feel free to post more questions out-of-thread so others can help out as well

#Artifacts