Downloaded the UE5 EA this evening as I’m excited to play with the new features. I’ve been working on various projects using raytracing lately and converted some of my projects over to UE5 and switched from RT to Lumen.
Is it expected that Lumen should have worse performance than raytracing? Examples are
Archviz style room:
RT: ~60fps, Lumen: ~45fps
Stylised village scene:
RT: ~47-50fps, Lumen: ~20-25fps
This is on a 3090 RTX and feels relatively low, though I have no idea what my expectations should be.
I had a play with some Lumen settings and also noticed Use Hardware Ray Tracing when available seems to make no difference to the framerate/time. Is there a way to confirm that Lumen is using hardware raytracing on my system? Is the option just not working/hooked up to the backend at the moment?
Any advice on Lumen performance, what to expect and how to optimise (other than what’s in the documentation - already scanned through that) would be great.