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Fix Missing Shader On Prefab

Menu Path: Right-click Prefab Asset > Fix Missing Shaders (Prefab → Standard)

A specialized cleanup tool for fixing "Pink" broken materials inside Prefab assets, commonly caused by missing shaders or shader errors after importing assets from different Unity versions or render pipelines.

Features​

  • Safe Editing: Uses Unity's PrefabUtility.EditPrefabContentsScope to modify prefabs without needing to instantiate them into a scene.
  • Detection: Identifies materials with null shaders or shaders marked as "InternalError" (the common cause of pink meshes).
  • Automatic Replacement: Replaces broken shaders with the default Unity Standard shader.
  • Recursive Scan: Deeply scans every child Renderer and every material slot within the prefab.

How to Use​

  1. Locate a "pink" or broken Prefab in your Project window.
  2. Right-click the Prefab asset.
  3. Select Fix Missing Shaders (Prefab → Standard).
  4. The console will log exactly which materials were fixed.

[!NOTE] This tool is specifically designed to work on Prefab Assets in the Project view, not GameObject instances in the Hierarchy.