Hi there!
I tried to use GI in my project, but if I do the shadows show strange artifacts like the ones in the picture below. What can it possibly be? It’s like my meshes have holes (which they don’t), so I’m puzzled.
Any ideas?
This is often caused by leaky models. Unwelded vertices, stuff not being water tight, gaps between edges, screwy normals etc… Sometimes you can increase the overall quality of the lighting to remove them but typically if this is the issue behind it then you should fix the model.
Try setting your models cast shadows to “two sided” - And bringing the shadow bias down to 0 on the light source that cast your shadows…
You could maybe also try to adjust the normal bias.