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Maniphest T84767

bevel (Miter Outer) + mirror modifier gives inconsistent result.
Confirmed, NormalPublicBUG
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Description

System Information
Operating system: Windows-10-10.0.19041-SP0 64 Bits
Graphics card: GeForce RTX 2070 SUPER/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 457.51

Blender Version
Broken: version: 2.91.0, branch: master, commit date: 2020-11-25 08:34, hash: rB0f45cab862b8

Short description of error
Mirror + Bevel modifier sometimes give some inconsistent result when using the "Miter Outer" options.

Exact steps for others to reproduce the error
Open the file to see the error.
Thank you


bevel.blend106 KBDownload

Related Objects

Event Timeline

Massimiliano Puliero (mmaaxx) created this task.Jan 16 2021, 7:31 AM
Robert Guetzkow (rjg) changed the task status from Needs Triage to Confirmed.Jan 16 2021, 11:22 AM
Robert Guetzkow (rjg) added a project: Modeling.
Robert Guetzkow (rjg) added a subscriber: Robert Guetzkow (rjg).

I can reproduce the problem shown in the screenshot. The problem does not appear when Loop Slide is disabled.

Campbell Barton (campbellbarton) changed the subtype of this task from "Report" to "Bug".EditedJan 19 2021, 5:19 AM
Campbell Barton (campbellbarton) added a subscriber: Campbell Barton (campbellbarton).

Confirmed, there seems to be differences that depend on the order of vertices in the face.

Flipping normals on all faces for example, resolves the issue.

Campbell Barton (campbellbarton) mentioned this in T82892: Bevel tool creates asymmetrical results on symmetrical objects.Jan 19 2021, 7:45 AM
Campbell Barton (campbellbarton) moved this task from Backlog to Bugs (Modifiers) on the Modeling board.Jan 19 2021, 12:35 PM
Campbell Barton (campbellbarton) added a project: Modifiers.
Chingiz Jumagulov (Krayzmond) added a subscriber: Chingiz Jumagulov (Krayzmond).Sun, Feb 7, 7:37 AM