Editing UVs after the fact

[charles-fernandez]

I've done this several times now on a couple different projects and it's caused me a  lot of grief. I'll create something in Maya, UV map it, and export if to Mudbox, put in ALOT of mudbox work, and then reealize I need to adjust the UV map, or change the mesh a bit... Is there a way to preserve the work that I've done in mudbox or do I have to start over from scratch every time I have to change something?

[nowayfra]

Import the mesh A with new UV layout into mudbox to your sculpted mesh B and extract a displacement map (mesh A as target an mesh B as source of course), then subdivide mesh A until it matches the subdiv level of your already sculpted mesh B and use "Sculpt using map" and apply the displacement map. This should work if you changed topology of your new mesh. Otherwise you could try the "Import UV" option.