When adding certain Material Instances to a Skeletal Mesh, the Material Instance break and renders as the World Grid Material. This persists in the project and the Material Instance cannot be used until the user restarts the project. Most of the Material Instances I tested have this problem, but I noticed that MI_Glass_Windshield_SunCover_Int works correctly. 


This does not occur when placing the Material Instance on a Static Mesh. This also doesn't occur with Materials being used on Skeletal Meshes. Tested in //UE4/Release-4.25 @ CL 14469661 and this does not occur so marking as a Regression.

Steps to Reproduce
  1. Create a Third Person Template project
  2. Add the Automotive Materials pack from the Marketplace into the project
  3. Drag a SK_Mannequin into the level
  4. Add a Material Instance such as MI_Rubber_Shiny or MI_CarbonFiber to the SK_Mannequin


The Material Instance renders as the World Grid Material


The Material Instance would render properly when set to a skeletal mesh

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ComponentUE - Graphics Features
Affects Versions4.26.1
Target Fix4.27
Fix Commit15360622
Main Commit15360622
CreatedMar 10, 2021
ResolvedMar 17, 2021
UpdatedApr 27, 2022