I am experiencing Lumen Reflection Noise with Unreal Engine 5.3.
@jblackwell Your explanation of the problem got me thinking and try a few different things. I found these settings that seem to be giving me much better results with Lumen Reflections with materials that have roughness, and significantly less noise.
With these settings it looks much more realistic than the “screenspace” reflections, and not as good as pathtracing (obviously), but it’s something in the middle utilizing lumen reflections but much less noise than the default settings.
Settings to reduce Noise with in Lumen Reflections:
r.Lumen.Reflections.MaxRayIntensity=3
r.Lumen.Reflections.BilateralFilter.SpatialKernelRadius=0.01
The defaults for these values are:
r.Lumen.Reflections.MaxRayIntensity=100
r.Lumen.Reflections.BilateralFilter.SpatialKernelRadius=0.001
