How to get smooth UV pos?

[iris112358]

Hi, Thanks again for open-sourcing this awesome work. I found that the UV diffusion models are sensitive to UV quality. If there are discontinuous parts in the UV, there will be a seam on the final texture. I saw the UV maps in the demo and paper are quite good, how can we get these high-quality UVs? I have tried xatlas, but it does not work well especially on complex meshes.