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Unwrapping meshes with ngons give bad results
Closed, ResolvedPublic


  • Operating System, Graphics card ---

Windows 10, 64 bit, GeForce GTX 1060

  • Blender version with error, and version that worked ---

Blender 2.79 (sub 6), branch: blender2.8, hash: b618c185cb7 , never worked.

  • Short description of error ---

Unwrap Error BlendStar.blend show how bad it is.
And the image .

  • Steps for others to reproduce the error (preferably based on attached .blend file) ---

To reproduce this, just select all faces in the image then do an Unwrap ( any setting it's the same )

The only thing to avoid this is to triangulate the mesh then uwrap then remove triangles.
But the algorithm sometimes doesn't do good with ngons in meshes .

Event Timeline

Pretty sure this is a known limitation of the Unwrapping algorithm (ngons - especially non-flat ngons), so you are probably better of using other methods like Smart UV project.

That being set: @Brecht Van Lommel (brecht): do you think there is room for improvement here?

The thing is that coming from other packages we're used to just select faces, then press unwrap and bam. All good . This happens in 2.8 too so maybe If we fix this here then, it will be fixed in 2.8 too .