Hey folks, I’m running into an odd issue where I’m getting baking artifacts after baking on the walls at the ceiling and floor edges, see attached images. I’m baking with 900 samples at 130 global resolution.
This could be my issue: My ceiling and floor are each a single plane (but separate objects) intersecting the walls by a small margin. This has never caused an issue with Vray baking interior scenes, but I suspect that I’ll need to append faces and close in the walls as a single piece of geometry.
Could you send us this scene (eg. by uploading it to our hosting), so we could take a closer look?
What @tim said can help here. The white artifacts look like if there were bright “inside the walls”, and this brightness were leaking into the visible part of the ceiling.
Thanks. It is called lightmap light leaking. Some of the top-most lightmap pixels for the walls are partially below the ceiling plane and partially above the ceiling plane. Where they are more above than below light leaks from the outside to the inside. (The same for bottom-most lightmap pixels for the walls and the floor).
To fix it please add outer surfaces for the ceiling and floor (like with vertical walls).