[Blender 2.82 release] Can't decrease the Subdivision Level in Sculpt mode (using Multires). #73884

Closed
opened 2020-02-16 16:07:19 +01:00 by Blendy · 4 comments

Blender Version
Broken: version: 2.82 (sub 7), branch: master, commit date: 2020-02-12 16:20, hash: 77d23b0bd7
Worked: 2.81a

Short description of error
Can't decrease the Subdivision Level in Sculpt mode (using Multires).

Exact steps for others to reproduce the error
Just launch Blender and switch to the Sculpt mode. Press "Ctrl+1", then press "Ctrl+2", "Ctrl+3", the mesh could be applied higher subdivision level. But then press "Ctrl+1" or "PageDown" key, nothing would happen. Although I could see the Subdivision Level was set to lower number, but the mesh topology had never changed.

**Blender Version** Broken: version: 2.82 (sub 7), branch: master, commit date: 2020-02-12 16:20, hash: `77d23b0bd7` Worked: 2.81a **Short description of error** Can't decrease the Subdivision Level in Sculpt mode (using Multires). **Exact steps for others to reproduce the error** Just launch Blender and switch to the Sculpt mode. Press "Ctrl+1", then press "Ctrl+2", "Ctrl+3", the mesh could be applied higher subdivision level. But then press "Ctrl+1" or "PageDown" key, nothing would happen. Although I could see the Subdivision Level was set to lower number, but the mesh topology had never changed.
Author

Added subscriber: @Rays-Lv

Added subscriber: @Rays-Lv
Blendy changed title from Can't decrease the Subdivision Level in Sculpt mode. to Can't decrease the Subdivision Level in Sculpt mode (using Multires). 2020-02-16 16:11:52 +01:00
Blendy changed title from Can't decrease the Subdivision Level in Sculpt mode (using Multires). to [Blender 2.82 release] Can't decrease the Subdivision Level in Sculpt mode (using Multires). 2020-02-16 16:12:58 +01:00
Member

Added subscriber: @EAW

Added subscriber: @EAW
Member

Changed status from 'Needs Triage' to: 'Archived'

Changed status from 'Needs Triage' to: 'Archived'
Evan Wilson self-assigned this 2020-02-17 00:34:25 +01:00
Member

Hello @Rays-Lv, thanks for the report.

This is an intentional change as there is a bug with Multires that can destroy sculpt data when the subdivision levels are decreased. See studio/blender-studio#58473 for more details. Fixing this bug will require some large changes that will take some time. In the meantime, Sculpting with Multires has been patched to force sculpting to only be done on the highest level. See D6244.

Hello @Rays-Lv, thanks for the report. This is an intentional change as there is a bug with Multires that can destroy sculpt data when the subdivision levels are decreased. See studio/blender-studio#58473 for more details. Fixing this bug will require some large changes that will take some time. In the meantime, Sculpting with Multires has been patched to force sculpting to only be done on the highest level. See [D6244](https://archive.blender.org/developer/D6244).
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Reference: blender/blender#73884
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