Luoshuang's GPULightmass

[wickerman123]

@DsyD

I was, but I switched them out for spot lights to see if they were bugged with GPULM.

I used git cherry-pick to merge the commit https://.com/EpicGames/UnrealE…1ccb5575c6d40b into my 4.22.3 build and it seems to work. It looked like it was still broken at first, but it seemed to fix itself after I made some meaningless changes to my material instances and re-saved them. Maybe the material data is cached somewhere and not updated unless it’s modified.

AFAIK rect lights do not support more than one bounce of GI calculation with GPULightmass so I would recommend not using them.