UV Master - Polygroup and Control Paint Issue - Control Paint Ignored

system · July 22, 2015, 6:34pm

I have a problem when UVing a character mesh in Zbrush using the UV Master. It unwraps and “relaxes” the separate polygroups perfectly, but it ignores the Control Painting for the face and back of the head. The red and blue areas simply disappear when I hit the unwrap button. I deleted the previous UVs in the UV roll menu as suggested on another post and made sure the mesh is all white. The mesh clone is clean. Very few people seemed to have this problem so I’m probably missing something obvious, but frankly, I’m about to lose my ****. Please, help. Image attached.

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dillster · July 23, 2015, 5:27am

I find it usually works better when the blue attract line is thinner, so ZBrush has a more defined or specific area to place the seams.

system · July 23, 2015, 7:38am

I have tried it that way to no avail. It still wouldn’t explain why Protect isn’t working in that case…

Thor · July 25, 2015, 1:39am

Here’s a couple things I would try:

If you’re using “Work on clone”, try NOT working on clone (or vice-versa).

Check your ZBrushData > ZPluginData > UVMasterData folder and make sure there are no old files in there.

Uncheck “Use existing seams”

It looks like you have polygroups checked, you might want to get the head in its own polygroup (it looks like it’s the same group as the arms?)

Finally, I don’t think this “should” make any difference… but try mirroring your model on the z-axis.

Altea · July 26, 2015, 5:41am

The issue of the painting disappearing it is an issue that I find in all recent versions of Zbrush, specially when you try to paint faces density and seam, you are likely to find that one has disappeared.
I mean not being ignored but rather simply disappearing. About being ignored, Zbrush seems rather stubborn on doing things in certain no predictable way. Some times doing some small changes in the painting does what I need but there is no way of knowing except trying several tests, after which the painting also will disappear random times.

system · July 28, 2015, 12:45pm

Thank you everyone. I gave your suggestions a try but none seemed to have any effect on the “ignored” Control Painting issue.

I managed to get a better result by giving the interior of the nostrils, eyelids, and ear holes their own polygroups and giving the face it’s own polygroup as well; I got more of that typical butterfly-ed face UV but the mouth was split open at the chin. I will most certainly not be UV-ing in Zbrush anymore. Anyway, thanks for your thoughts.