# render.shader.fallback

> Talos next · Since 0.6

a user shader's pipeline failed to compile, once per shader family; its materials draw with the built-in fallback derived from the shader at t=0 (its average base colour, emission, roughness and metallic)

| | |
|---|---|
| Severity | `warning` |

## Meaning

a user shader's pipeline failed to compile, once per shader family; its materials draw with the built-in fallback derived from the shader at t=0 (its average base colour, emission, roughness and metallic)

## Fix

fix the error `explain.rule` gives for the shader's own code (`shader-compile-error`, `shader-forbidden`, `shader-loop-unbounded`) and rebuild