Description

If a material contains a Texture Sample node with Sampler Source set to Shared:Wrap or Shared:Clamp, setting r.MipMapLODBias will have no effect on the blurriness of the material.

Regression:
No - same behavior occurs in 4.16.3 binary

Steps to Reproduce
  1. Open UE4 Editor with starter content (any project)
  2. Add a cube mesh to the scene
  3. Create a new material
  4. In the material editor, hold 'T' and left click to create Texture Sample node
  5. Set Texture to T_Bush_D
  6. Apply/Save material and apply it to the cube mesh
  7. In the editor console, enter 'r.MipMapLODBias 5'
    • The leaf design should be blurred / cube appears solid green
  8. In the material editor with the texture sample node selected, set Sampler Source to Shared:Wrap
  9. Apply/Save material

Result:
When Shared:Wrap is set, the material on the cube appears the same with r.MipMapLODBias 5 as it does with r.MipMapLODBias 1

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ComponentRendering
Affects Versions4.16.34.17
CreatedAug 11, 2017
UpdatedAug 18, 2017