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2.78 RC2 - texture mapping distorted when using Experimental adaptive subsurf
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Description

In Blender 2.78 RC2, the texture mapping seems to get distorted when enabling the experimental Adaptive Subsurf feature.
Attached is an example blend file

. With a rendered viewport open, just toggle the "Adaptive" box in the subsurf modifier to see the issue.
Here's what I did:
Launch Blender 2.78 RC2.
Enable experimental feature set.
Subdivide the default cube in edit mode 2 times.
Alt-Shift-S and set to To Sphere to 1.0 to round out the cube.
UV Unwrap the cube with spherical mapping.
Assign an image texture to the material.
Apply a subsurf modifier.
Open a Rendered preview viewport.
As soon as you check the Adaptive box in the subsurf modifier, you see the texture get kinked.
Example without adaptive:

Example with adaptive:

Details

Type
To Do

Event Timeline

Sergey Sharybin (sergey) lowered the priority of this task from Needs Triage by Developer to Normal.
Mai Lavelle (maiself) changed Type from Bug to To Do.Sep 21 2016, 2:29 AM
Aaron Carlisle (Blendify) closed this task as Archived.Sep 21 2016, 4:36 AM

I do not think a task is needed for this. Subdivisions of UV's are currently not supported. To work around this add a subsurf and apply it then add another subsurf and use adaptive.