Looks like this behavior was working as expected until 5.1 Preview 2

Steps to Reproduce

1. Create a blank project and open a blank map in UE 5.1
2. Turn on Volumetric Fog in Exponential Height Fog actor and increase fog density to
3. In skylight, change cubemap type to specified cubemap and configure it to use
DaylightAmbient Cubemap. Increase skylight intensity to 10
4. (Optional) Remove the sky sphere, volumetric cloud and sky atmosphere to avoid
5. Observe the difference in this scene when GI method is set to Lumen vs None

Do the same with UE 5.0.3, and observe correct behavior with Lumen enabled.

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ComponentUE - Rendering - Lumen
Affects Versions5.1
Target Fix5.1.1
Fix Commit23251858
Release Commit23251858
CreatedNov 24, 2022
ResolvedNov 28, 2022
UpdatedDec 7, 2022