Overriding ambient light.

Where should I look into? Maybe the standard shader code? I want to do something on a per-renderer or material basis.

 

Vertex Lit is what you need to use I think. There are better expert than me around though.

 

I'm also learning. I think that vertex lit stuff fits better the old tech I'm considering to use since LP won't let me do dynamic stuff.

 

Well which Unity 5.4 Release you may be right. Something has changed with VertexLit handling.

I had to chose some 'Mobile/Particles/VertexLitBlended' for my scene previous Unity 5.4 release and they had worked in the past, it was to get some models foilage to work in my scene but now that I have adjusted my scene to use Mixed lighting and then baked that has caused everything with VertexLit Blender shaders to become completely transparent.

So I will have to choose another shader or another set of models...which is a hassle considering all the time I spent placing those trees.

 

Hello from 2023.

Is it possible now to override Ambient Light per-renderer?

- Unity 2020.3.18f1
- Built-in render pipeline

There is
https://docs.unity3d.com/ScriptReference/MaterialPropertyBlock.CopySHCoefficientArraysFrom.html

with
https://docs.unity3d.com/ScriptReference/Rendering.SphericalHarmonicsL2.html

that work's fine with MeshRenderer, you can enable it this way:

Code (CSharp):

1. var _harmonics = new[] {new SphericalHarmonicsL2()};
2. SphericalHarmonicsL2 sh1 = new SphericalHarmonicsL2();
3. sh1.AddAmbientLight(SHcustomAmbientColor);
4. if (SHuseCustomDirectionalLight)
5. {
6.     sh1.AddDirectionalLight(SHcustomLightDirection, SHcustomLightColor, SHcustomLightIntensity);
7. }
8.  
9. _harmonics[0] = sh1;
10. MaterialPropertyBlock prop = new MaterialPropertyBlock();
11. renderer.GetPropertyBlock(prop);
12. prop.CopySHCoefficientArraysFrom(_harmonics);
13. renderer.lightProbeUsage = LightProbeUsage.CustomProvided;
14. renderer.SetPropertyBlock(prop);
15.  

And disable with:

renderer.lightProbeUsage = LightProbeUsage.BlendProbes;

But with SkinnedMeshRenderer Enable code work fine, but to disable you need also:

Code (CSharp):

1. MaterialPropertyBlock block = new MaterialPropertyBlock();
2. renderer.GetPropertyBlock(block);
3. block.Clear();
4. renderer.SetPropertyBlock(block);

And re-enabling this override on SkinnedMeshRenderer after MaterialPropertyBlock.Clear() on it will be lit twice, by LightingSettings.ambientLight and by overriden SphericalHarmonicsL2[].

May be there is more correctly working way to override Ambient Light on per-renderer bases, including SkinnedMeshRenderer?