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Maniphest T66488

Crease Function in Multires modifier
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Description

System Information
Operating system: MacOS (current Mojave 10.14.5)
Graphics card: Radeon Pro 570 4GB

Blender Version
Broken: 2.80 Beta
Worked: (optional)

Short description of error
Multires Modifier shows strange functionality with creases. It seems to invert the crease profile.

Sudivision Surface Creases are excellent.

Exact steps for others to reproduce the error
-Default cube, in edit mode crease edges to 0.50.
-Object mode add Multires modifier.
-Subdivide a few times inside the modifier.

Thank You,

James

Event Timeline

James Light (jameschaselight) created this task.Jul 6 2019, 12:51 AM
Sebastian Parborg (zeddb) lowered the priority of this task from 90 to 30.Jul 10 2019, 10:41 AM
Sebastian Parborg (zeddb) added a subscriber: Sebastian Parborg (zeddb).

I can not reproduce this, using a cube with a subdiv modifier gives the same result.

Does this still happen with the latest blender beta?

James Light (jameschaselight) added a comment.Jul 12 2019, 6:37 AM

MultiresolutionCreaseError.blend2 MBDownload

Hello Sebastian,

Thanks for getting back to me on this. I've reproduced the error on a Windows machine and attached the file.

*if the Mean Crease is set to 1.00, everything functions as normal. If it is set to anything below (0.3, 0.5, etc.) the error occurs.

Once again if you use a Subdivision Surface modifier everything is perfect. However, if you use Multiresolution modifier instead, the creased edges produce a strange error.

Thanks Again,

James Light

Sebastian Parborg (zeddb) assigned this task to Sergey Sharybin (sergey).Jul 12 2019, 10:55 AM
Sebastian Parborg (zeddb) raised the priority of this task from 30 to 50.
Sergey Sharybin (sergey) added a comment.Jul 15 2019, 10:34 AM

This is caused by a transitional state of code, where Subdivide uses old subdivision algorithm, but sculpting and drawing are using new one: causes mismatch how displacement is being updated and propagated.

Sergey Sharybin (sergey) closed this task as a duplicate of T58473: Multires: changes not smoothly propagated from low to high, for example with apply base.Jul 15 2019, 10:34 AM