UV map fixer?

etsuja

Is there a program that will automatically fix a uv map where the seam verts have been stretched to meet the other seam? My UV map has been messed up after sculpting in mudbox.

Eric Chadwick

Most UV mappers these days have a Relax function, without a pic though it's hard to see what you're talking about.

etsuja

The un-subdivided uv is fine but after subdivision this is what happens. The new vertices at the seams from subdivision are stretched all over.

Eric Chadwick

Looks like the UVs were imported incorrectly. Before subdivision, do you have green lines everywhere? To prevent this from happening you probably just need to weld the coincident UV vertices within each UV shell. This ideally should be done automatically by whatever importer you're using. Best one these days is OBJ, and this is the best OBJ plugin by far:
http://www.guruware.at/main/objio/index.html

etsuja

Thanks for the suggestions and I tried them but it seems to be a problem with the mudbox exporting of the UV map.

Know of anything that will fix them automatically?

Eric Chadwick

Well, if you're using Mudbox, you're probably making a high-res sculpt that you're going to bake down into a normal map or a displacement map, in which case the Mudbox UVs don't matter, it's just the lower-poly base mesh that needs UVs.

If you still need those Mudbox UVs, then testing different export & import options is the best bet.

etsuja

I actually was gonna use the higher res sculpts for animation but I guess I'll have to figure something else out.

Eric Chadwick

OK, then you could try using Skin Wrap to project UVs from the original low-res model onto the newly imported Muddie. I haven't done this, but I seem to recall others doing it, a search might turn up some info about Skin Wrap.

Eric Chadwick

Hey, I was just looking thru James' scripts for soemthing else and saw one that might work for you, Weld All UVs.

Eric Chadwick

Hey even better.
http://neilblevins.com/cg_education/mudbox2_max/mudbox2_max.htm

etsuja

It's working now, thanks for taking your time to help me out.