Hello, We are currently having a debate internally about using CPU or GPU Lightmass. We are currently using GPU Lightmass, and there was a general understanding that GPU Lightmass was where the development focus for baked lighting would be on Epics side. Since then it’s been brought to our attentio…

Hello, Unfortunately CPU and GPU lightmass have been in maintenance mode for some time and we don’t have plans for any major updates because our focus has been on realtime lighting. If you are considering GPU Lightmass, be aware there is a known issue preventing it from working with CSM https://iss…

Hi Alex, Thanks for your answer. I’ve got a quick overview from our Team. Please note: not all of this has been deeply investigated on our end yet, this is just a quick list of initial thoughts on our end. GPU LM: + Should be theoretically faster to bake. + Has the community branch which seems …

Thanks for the feedback, I’ve passed it along to our team to help prioritize future work in the area. [Attachment Removed]

I have more issues with CPU LM. I will link my previous post here. I hope this can be resolved in the future: [image] Unreal Engine 5.8 Preview Announcements Will CPU Lightmass receiving any updates? I know according to epics standpoint it is in maintenance mo…

Recommended Lightmass Version

Development Rendering

apfelbaum (apfelbaum) May 18, 2026, 10:53am 6

I have more issues with CPU LM. I will link my previous post here. I hope this can be resolved in the future: