Question The default error shader

Is there any way in Unity to know, that there is magenta error shader present in the scene via script? Like, can we really know through code, that material, rendered in scene is actually magenta pink and not one we wanted?

 

Grab all the materials referenced in the scene, and check if any have a

.shader.name

of

"Hidden/InternalErrorShader"

 

Nice. Thank you! Could not find this

 

Hmm, when I did this:

Code (CSharp):

1. Renderer[] renderers = FindObjectsOfType<Renderer>();
2.         foreach (var renderer in renderers)
3.         {
4.             if (renderer.material.shader.name == "Hidden/InternalErrorShader")

It always returns an actual name of shader, assigned to renderer, but not the error one uniny actually renders

 

If they're pink because they're simply not compatible with the pipeline you're currently using, then I'm not sure what the solution would be in that case. The method I posted will just handle the case for missing or broken shaders, not simply incompatible ones.

You can try the

shader.isSupported

value as well to catch some other cases. But it still won't help for shader that simply don't render in the current pipeline.

 

shader.isSupported

: returns true if the shader itself or any fallbacks setup in the shader are supported.

The documentation said that it will return true for an unsupported shader with any available fallback (shader).

I think you can also use the GPU's shader model level to check whether a shader is unsupported (magenta or ignored by the rendering)

For example, if a geometry shader with no fallback shaders is running on a GPU with shader model 3.0, it (the mesh) will be ignored (completely transparent) because the GPU doesn't support it.

 

By the way, this line (URP Lit) is the fall back shader.

 

You can also check URP/HDRP shaders by checking the material render pipeline tag:

Code (CSharp):

1.                     if (material.GetTag("RenderPipeline", false) == "")
2.                     {
3.                         // BIRP shader
4.                     }
5.  
6.                     if (material.GetTag("RenderPipeline", false) == "UniversalPipeline")
7.                     {
8.                         // URP shader
9.                     }
10.  
11.                     if (material.GetTag("RenderPipeline", false) == "HDRenderPipeline")
12.                     {
13.                         // HDRP shader
14.                     }

 

Can you please describe, how it can help to find error shaders in scene?