problem with Lumen when lighting large scale set

[OM_WEBROS]

Hi,
I am new to unreal, trying lumen for global illumination. the problem is its not working at some distance from camera, when camera moves to that area its lighting other wise its dark.
tried google-ling for a solution found some commands like r.LumenScene.FarField, r.RayTracing.Culling.Radius but none of them are effective.
is there any other solution?

[BananableOffense]

You will need to look at the viewmodes (accessed in the top left of the viewport). There are a variety of lumen viewmodes that will allow you to see what it is doing. I’m not so sure this is being caused by lumen, but until you look at those viewmodes we can’t know.

[OM_WEBROS]

i think the problem is the project unit, i changed it from cm to km and used r.RayTracing.Culling.Radius 100000 command also increased max trace distance in post process volume. now problem seem resolved