Page MenuHome

Regression? new tessellation algorithm produces artefacts with flat, flipped-faces mesh.
Closed, InvalidPublic

Description

System Information
Debian AMD64, 8 GB RAM, Radeon HD

Blender Version
Broken: current master, first noticed in december!!
Worked: 2.69

Short description of error
Using an armature with "preserve volume" on a mesh with vertex weights produces a different (jaggy) result than in 2.69.

Exact steps for others to reproduce the error
I attached a .blend file.
Compare frame 176 in 2.69 with current git master.
Also press Alt+A to play the animation and you should notice a somehow jaggy animation in current git version.

Thank You!
Robert

Details

Type
Bug

Event Timeline

Robert M (robertm) raised the priority of this task from to Needs Triage by Developer.
Robert M (robertm) updated the task description. (Show Details)
Robert M (robertm) set Type to Bug.

"Issue" is caused by rB5da703e9158a, which introduced a new tessellation algorithm. Assigning to Campbell to get its advice on this.

However, please note that that kind of mesh (flat one with flipped faces) is not a "good practice", it’s prone to issues…

Bastien Montagne (mont29) renamed this task from Regression: Vertex weights + Preserve Volume Armature to Regression? new tessellation algorithm produces artefacts with flat, flipped-faces mesh..Mar 6 2014, 9:59 AM

self-intersecting faces are simply not supported - if you do this you could get problems with the old tessellate too though its did handle these better in some cases.

Nevertheless this isn't a bug. closing.

Campbell Barton (campbellbarton) changed the task status from Resolved to Invalid.Mar 6 2014, 12:05 PM