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headus 3D scans

UVs turning red on re-import to uvlayout

 
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Asimov



Posts: 18
Joined: 03 Apr 2015

PostPosted: Tue Oct 12, 2021 10:10 am    Post subject: UVs turning red on re-import to uvlayout Reply with quote

So I flatten everything out in uvlayout and then I pack, and I send it back to max, which works fine, and everything looks ok.

Later I need to make a few alterations to the uvs, so I send from max back to uvlayout.
However when I send back everything is in place, but for some reason now everything has turned red, so I have to re-flatten to get it green again.

Is this normal?
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headus
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Posts: 2882
Joined: 24 Mar 2005
Location: Perth, Australia

PostPosted: Sun Oct 17, 2021 7:58 pm    Post subject: Reply with quote

Whenever importing an OBJ (or load via a plugin), UVLayout looks at the total area of 3D geometry vs the total area of UVs to decide if flattened shells are too large (blue) or too small (red).

If you're reloading some previously flattened geometry and its not green, then one possibility is that some new (possibly unflattened) geometry has been included that's throwing out the balance of 3D vs UV areas.

Anyway, regardless of the cause, the quickest fix is to select the red shells and click the "Green Balance" button under the Move/Scale/Rotate panel. This tool has been in the Pro version for a while, but was added to the Hobbyist/Student versions in v2.11.00 (Feb 2019).
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