I have a question regarding light map. I have created a modular wall asset. I took the same wall asset and cut a hole in the top middle area.
But when I put the wall assets together, it create this very distinct shadow seam ( marked in red ).
Before I had the same light map uv as before and it has the seam, I then tweak the uvs and have snapped my light map uv to the grid but it doesn’t seem to help.
I’m wondering why with the same asset, but modifying the mesh cause such lightmap seam in lighting ?