Hey everyone,
I’m running into an issue with the official GPU Lightmass plugin. When I click “Build Lighting,” it seems to go through the motions, but then, nothing. My scene with a static light renders completely dark. If I switch to other light types, like stationary lights, I only get dynamic lighting and shadows. The shadows still say “preview,” even after baking, and I’m almost certain the “lighting needs to be rebuilt” message never goes away.
It’s like it’s just failing silently because I’m not getting any warnings or errors. I thought that it might be an issue with AMD GPUs, but I tried this in UE4, and it worked perfectly fine.
Here’s what I’ve tried so far:
-
Enabled hardware ray tracing
-
Set up Virtual Textures:
- Enabled Virtual Texture Support
- Enabled Virtual Texture Lightmaps
-
Adjusted settings under Platforms > Windows:
- Targeted RHIs > Default RHI: DirectX 12
-
Lumen disabled as GI (tried enabled too as well as screen space just in case)
-
Nanite on/off (who knows)
For reference, my specs are:
- Unreal Engine 5.4.4 (Did not work in 5.4.3 either)
- Windows 11
- AMD RX 7900 XT GPU
- AMD 7800X3D CPU