CPU lightmass Vertex Colors don't emit GI

General Issues and Bug Reporting (Unreal Engine)
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Summary

When baking static lighting with CPU Lightmass, Vertex Colors are not respected with bounce lighting

What Type of Bug are you experiencing?

Rendering (Graphics / Niagara)

Steps to Reproduce

  1. Create a new project
  2. Allow static lighting
  3. create a static directional/sky light
  4. drag a few boxes like seen on the screenshot
  5. assign one material with a constant red color plugged into the diffuse to a box
  6. assign one material with a vertex color plugged into the diffuse to another box
  7. fill the box with the VC material with a red color
  8. bake lighting
  9. inspect the result in “Detail Lighting” mode

Expected Result

Vertex Colors are respected when baking lighting

Observed Result

The right cube has the vertex color material assigned (selected cube, no red GI), the left cube has the constant color material assigned.

Affects Versions

5.8

Platform(s)

Windows

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Baked Lighting.PNG
Baked Lighting.PNG1919×1051 890 KB

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UE-391022 has been ‘Backlogged’. This is an issue that is in a queue to be addressed.