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Unsubdivide support for non-grid topology
Open, Confirmed, MediumPublic

Description

System Information
Operating system:mac os mojave 10.14.5
Graphics card:intel iris 550

Blender Version
Broken: d62a749fcf48
Worked: never

Unsubdive either from the edge menu or under the decimate modifier not giving expected result with many production models. This never worked well so I figured I put in a report since I haven't seen an active one.

Exact steps for others to reproduce the error
Attached blend file, unsibdivide fails more often than not, producing triangles with unsubividealbe geometry. Works in other packages though, so it's not a problem with the geo.


Details

Type
To Do

Event Timeline

I don't know how the tool currently works, but the one's I saw before would take the last vertID, convert it to en edge selection, select the loop, every 2nd ring, repeat, delete the edges. Just guessing here but if in Blender checker deselect is involved, that'd have some problems with 3-5 pole verts (this might be a different issue though) -

Un-subdivide currently only works on grid-topology, this would be useful to add but not a bug, moving to TODO.

Campbell Barton (campbellbarton) renamed this task from unsubdivide issue to Unsubdivide support for non-grid topology.