Lumen Scene / bright interiors and broken reflections (kind of solved)

Development Rendering
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1

UPDATE:

So the standard setting is:
r.Lumen.MaxTraceDistance = “10000.0”

changing that value will solve the issue with the limited reflection distance.

The other problem I could kind of solve by changing the proxy triangle percent in the mesh settings. This is not a great solution since its causing a huge performance drop with highpoly meshes.

Original post:

So. I was wondering why my interior is looking very bright and flat. After checking everything I could think of I found out that the Lumen Scene view is looking very broken. Is there any console command I could try or do I have to do something different with my meshes?

light only

lighting_only
lighting_only1113×625 248 KB

lit
lit
lit1081×620 212 KB

lumen scene
lumen_view
lumen_view1138×628 111 KB

nanite overview
nanite
nanite1125×619 352 KB

distancefield
distancefield
distancefield1101×601 176 KB

global df
globaldistancefield
globaldistancefield1090×594 27.8 KB

2

It looks like from your nanite view that this corridor is made of pieces

If you take one of those pieces and move it away from the corridor so that you’re just viewing it alone, does it look correct in the Lumen scene or is it still just a jumble of random triangles?

1 Like
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Hey thanks for your answer. Sometimes I feel like this is a ghost forum :wink: Yes it was. I “fixed” it by changing the triangle percent in mesh settings. It was on 0 and now its on 1. Reflections are looking okay now as well (after changing the maxtracedistance) Still the lighting is not looking good. The skylight is just not being blocked. I guess Lumen cant handle big halls or I cant find the correct console command.

fixed mesh lumen view

lumen_view_fixed
lumen_view_fixed1928×1151 443 KB

with r.Lumen.MaxTraceDistance 10000.0

lit_view_bad_lumen
lit_view_bad_lumen2100×1119 578 KB

with r.Lumen.MaxTraceDistance 50000.0

lit_view_ok_lumen
lit_view_ok_lumen2100×1119 590 KB

4

“Lumen has an experimental Distant Scene representation to provide traces past the Surface Cache. It covers the range of 200 meters to 1 kilometer from the camera.”

So I guess thats whats causing a lot of my lighting issues. While it looks like a corridor its actually pretty big. ( 500 meters. ) I was trying to r.LumenScene.DistantScene 1 but it does not seem to do anything. Maybe its not build in. I guess I’m gonna scale down everything to as a workaround for now. =)