Hello!

I am having a visualisation issue. After small luminaire changes (not anything about the model itself), my flat surfaces started appearing blackish as it is integrated with other surfaces. However all of the surfaces were created on DIALux and they are plain painted surfaces. Moreover, even though there is no huge block in the model, it just appeared by itself (as you can see in the second image). When I get a raytrace image, the black areas appear bigger. How can I get rid of them?

Thank you,

Melike