Summary
CPU Lightmass is broken. Skylight bounce is not working on static meshes as well as clear coat enabled materials dont have skylight occlusion. this affects legacy as well as substrate materials.
The name of the screenshot tells you the combination of material system and skylight mobility.
What Type of Bug are you experiencing?
Rendering (Graphics / Niagara)
Steps to Reproduce
Create a new scene
Project Settings:
Allow Static Lighting
Global Illumination = None
Generate Mesh Distance Fields = False
Shadow Map Method = Shadow Map
New Scene:
Directional Light → Movable
Skylight like described in the following screenshots
Bp_Sky_Sphere (which has still not IsSky enabled)
LightmassImportanceVolume
World Settings:
Volume Lighting Method: Sparse Volume Lighting Samples
Expected Result
by baking the lighting the skylight occlusion and bounce are baked and rendered. substrate doesn’t support GI in any combination.
Observed Result
- skylight bounce is not visible on meshes
- static skylight: clear coat (sphere) has no sky reflection
- stationary skylight: clear coat has no sky occlusion (when below other meshes)
Affects Versions
5.8
Platform(s)
Windows
