Mudbox Paint Layer causing crazy?

M-Cubed

Hey guys. I just started getting into Mudbox again. Haven't touched it since version 2009. Anyway, I have this one object that's doing something funky whenever I apply a paint layer to it. It looks like some polygons are flipping or some such. When I delete the layer (not undo) it goes back to normal.(See images)





Tried re-exporting, checking normals, fbx and obj, etc. but all to no avail. Wondering if anyone else has had a similar problem, and would appreciate any help. Thanks!

gavku

what sort of uv setup does this have?

M-Cubed

It's part of a larger piece but it's all spread out. Nothing overlapping, and nothing inverted.

M-Cubed

I just did an experiment where I deleted the polygons giving me trouble in Max, and rebuilt the mesh, and it worked just fine in mudbox. Not a great solution, because now I have to redo my UVs. Hopefully it won't happen again, but would still like to find a better solution.

joebount

have you tried simply to reset xform or attach the geometry to a newly created cube, then reset xform ?

M-Cubed

joebount - I tried just reseting the xform before, but I also just tried attaching it to a cube as you suggested. Neither prevented those same faces from goin wonky.

thomasp

well if you still have the broken mesh, you could put an edit normals modifier on it in max and check if the vertex normals have gone crazy on that part of your piece.

SpeCter

This looks like the vertex order is going wonky on him, not sure why it would do that when applying a paint layer though

M-Cubed

thomasp - I checked the normals with the edit normals modifier and they seemed fine to me. I did some more tests, and when I made a different UV layout for the mesh just via a quick planar, the problem no longer came up.

I didn't want to redo my entire UV layout for all the pieces of the character, so I also just tried importing the mesh into Maya, and exporting from there, and that also seemed to work. Still unclear as to the actual issue, but at least I can move along with the project now.

Hang10

I could be wrong but I was having a similar issue last night painting in MB and it's because my mesh was triangulated on import. When I would paint in the edge it would fill a triangle. Instead of solving it I would leave it and in Photoshop I'd correct it.

Hope this helps :S

atac

M-cubed, if you post the problem mesh to this thread, I'd be happy to take a look at it.