Generating unique UVs stops and freezes at 57%

Since I always had problems with overlapping UVs, I try to generate unique UVs to get around that problem.

It works fine for small Meshes but with bigger complex FBX imports (a big house) it goes up to 57% and then freezes and I have to close U4 since it is not responding anymore.

So what’s wrong?

how do you mean it was the badly modeled gruond?

Found the problem, it was the badly modeled ground that created the freeze, after deleting it it went fine…