How can I set the lightning properly so it doesn't get weird blotches

Development Rendering
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1

Hi there,

I am getting strange lightning leaks & shadow moving blotches in walls.

How can I get it working properly?

See arrows on the image:

ca
ca2250×855 124 KB

2

The general advice for Lumen is to have them as separate independent meshes. Also, it’s recommended to have objects (walls, etc) as 10cm minimum thickness.

3

it has been exported from twinmotion (datasmith)