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I added a Subdivision Surface modifier, Creased some edges to 1.00 and some white spots appeared. I've never seen that before. Is something wrong with the UV shading?

enter image description here

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  • $\begingroup$ Maybe it's the base mesh representation intersecting with the modified mesh representation. Try grabbing a vertex near there and moving it in and out. $\endgroup$ – Ron Proctor Sep 29 '16 at 16:18
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It simply means that the subsurf is generating mesh outside the bounds of the non-subsurfed mesh. It's not an issue and they will not show as soon as you Tab back to Object Mode.

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