Shadows cast on a translucent forward shaded materials renders with jagged edges. In 4.27 the edges are different with some jagged points only those points are not as prominent.


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Steps to Reproduce
  1. Create a new blank project with starter content with Preview 2
  2. Enable Surface Forward Shadowing in the Project Settings
  3. Create a new material
  4. Set the materials Blend Mode to Translucent
  5. Set the Lighting Mode to Surface Forward Shading
  6. Add a Constant Vector 3 to the graph set it to (1,1,1) then connect it to Base Color
  7. Apply, Save, and close the material
  8. Place a Cube in the level then expand the cube to be a wide surface
  9. Apply the Translucent material to the cube
  10. Place another cube over the first cube so that it casts a shadow on the first cube

Expected Results:
The shadow renders smoothly when to and away from it

Actual Results:
The shadow renders with jagged edges when getting close to the shadow

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ComponentUE - Rendering - Materials
Affects Versions5.0
Target Fix5.4
CreatedMar 31, 2022
UpdatedJan 19, 2023