Passing Texture3D to shader through EntitiesGraphicsSystem | Official Unity Discord | Page 1

main lava Feb 16, 2024, 7:57 AM

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Is something wrong with my setup?
Setting the shader by doing:

var material = new Material(Shader.Find("Shader Graphs/VoxelShader"));
material.SetTexture("_VoxelTexture", texture.texture);
var materialID = hybridRenderer.RegisterMaterial(material);

Debug.Log(texture.texture.GetPixel(0, 10, 5));
tex = material.GetTexture("_VoxelTexture") as Texture3D;
Debug.Log(tex.GetPixel(0, 10, 5));

EntityManager.SetComponentData(voxelChunkEntity, new MaterialMeshInfo() { MaterialID = materialID, MeshID = meshID });

But the output is just white. As you can see in the console, the color is correctly Color.red.

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The shader graph is very simple, but even passing R => Base Color(3) displays a white mesh — is the material even being applied?

heavy crystal Feb 16, 2024, 8:10 AM

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Is the name of your texture correct in the Shader?

main lava Feb 16, 2024, 8:58 AM

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It is, "_VoxelTexture"

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I've double checked all the names

heavy crystal Feb 16, 2024, 9:39 AM

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no idea sorry, we're using 3d textures and they seem to work fine

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but i didn't set it up and it's all handled by baking instead of being set at rutnime

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i'll take a quick look at the shader to see if i spot anything of interest

heavy crystal Feb 16, 2024, 9:56 AM

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ah that's not going to be much help, handled by a custom function for raymarching

main lava Feb 16, 2024, 10:08 AM

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Hmm.. I've tried to initialize the MaterialMeshInfo with a materialID, retrieving that and setting the texture from there. No avail.

var mmi = EntityManager.GetComponentData<MaterialMeshInfo>(voxelChunkEntity);
var hybridRenderer = World.GetExistingSystemManaged<EntitiesGraphicsSystem>();
var material = hybridRenderer.GetMaterial(mmi.MaterialID);
var meshID = hybridRenderer.RegisterMesh(mesh);
material.SetTexture("_VoxelTexture", texture);

main lava Feb 16, 2024, 11:18 PM

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Man, I'm having a hard time finding a single resource that illustrates how to set a texture in a material

heavy crystal Feb 16, 2024, 11:54 PM

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reason i was asking about your texture name in your shader before was this would usually be called VoxelTexture

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weird to have the name and reference so different

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anyway about to test my own copy

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for curiosity
well i dont know what i expected from the 3d textures for drawing, but it's definitely rendering something but not really what i expected tbh

main lava Feb 17, 2024, 5:08 AM

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So with the same setup you managed to have confirm that the texture is at least being applied to the material?

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Oh and yes, it's correct. I just didn't bother to change the name of the node.

heavy crystal Feb 17, 2024, 5:13 AM

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main lava So with the same setup you managed to have confirm that the texture is at least ...

well it changes visually if i pass a different 3d texture so it's doing something

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but i'm just applying this to a cube so the texture doesn't make much sense

main lava Feb 17, 2024, 5:27 AM

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Are you applying the texture through hybridRenderer?

heavy crystal Feb 17, 2024, 5:37 AM

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oh i just baked it

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i didn't set anything at runtime

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i was more just curious if this worked at all

#Passing Texture3D to shader through EntitiesGraphicsSystem