UE 5.6 Lumen cannot be enabled

Gusseknudsen · August 8, 2025, 9:01am

No matter what I try, I can not get Lumen to work, it keeps sayin that it’s not enabled! I’ve tried so many things, and reinstalled ue 5.6, verify, new empty projects, updated graphic drivers (RTX 4070) but nothing works. Everything works fine in UE 5.5!

Ruffhaus · August 8, 2025, 9:49am

Do you have Generate Mesh Distance Fields and or Support Hardware Ray Tracing enabled?

Gusseknudsen · August 8, 2025, 9:50am

yup

Ruffhaus · August 8, 2025, 11:37am

in your projects config folder in the DefaultEngine.ini does r.DynamicGlobalIlluminationMethod=1?

myasga · August 8, 2025, 12:29pm

Be sure you have also settings in the engine minimum scalability set to high but epic is preffered since much more visible.
test in post process:
make sure Post process have infinte extent
if that cannot help switch to software raytracing and check it out.