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Decimation master messing up uvs

Hello people. I have a problem with decimation master not keeping uvs.

Here s the scenario. I created a low rez mesh with uvs in maya. Then i import it in zbrush. Divide the mesh to approx 15 million polys. Then i sculpt. Then i decimate to 200k while doing keep uvs and borders.

The mesh is mostly ok and the uvs also but some uvs get screwed up. Some get disconnected from the mesh and appear in negative uv space in maya. Is there a way to prevent or fix this?

Thanks for the help!

It’s not necessarily Decimation Master that is causing the problem. Import your good mesh again and go to “Tool > Texture Map > Create” and click “New From UV Check”. If there is any red in the resulting map, then ZBrush doesn’t like your UV Map. This is usually a result of a UV island touching the border of the UV space. Scale or move your UV islands in a bit so they are not touching the border.

Thank you for your reply. Uvs are “perfect” as they were generated with uvlayout and were packed. But i will have a second double check just in case. Thank you for the suggestion!