Regression: Multiple modifiers failing when deactivating/activating collections #98379
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Reference: blender/blender#98379
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Memory: 16 GB RAM
Processor: AMD Ryzen 5 3600 6-Core Processor 3.59 GHz
Operating System: Windows 10
Graphics card: NVIDIA 2060 RTX (8GB VRAM)
SCENE DESCRIPTIONBlender Version 3.1.2
Broken: 3.1.2, elder_sprite_packed.blend, 2022-05-25
Worked: 3.0.1
Bisected to
a230445caeNOTE: This is official Elder Sprite Rig downloaded from studio.blender.org. The only changes were some bones posed and the rig moved as an object to a new location and rotated for demonstration purposes.
BUG DESCRIPTION:Activating and deactivating a collection will break the rig. In viewport and rendered viewport, the rig will appear completely broken, but it it works correctly when rendering. Making any change to the rig solves the issue.
HOW TO REPRODUCE THE ERROR:Open the elder_sprite_packed.blend file
Deactivate any collection and reactive it using the checkbox. On reactivating, the error should occur.
Selecting the rig or any object and pressing "G" to move and wiggling it before releasing with right-click will fix the issue.
elder_sprite_packed.blend
Blender_ [C__Users_Mark_Downloads_elder_sprite_packed.blend] 2022-05-25 16-59-37.mp4
NOTE: This bug has been seen on multiple systems and with multiple different rigs which use lattices and/or shrinkwrap objects, cloth simulation (turned off with a driver by default) and other object and bone constraints relying objects hidden in the viewport.
Simplified file:
elder_sprite_packed_simplified.blend
Added subscriber: @Munkle_Mark
Multiple modifiers failing when hiding/hiding or deactivating/activating collectionsto Multiple modifiers failing when deactivating/activating collectionsAdded subscriber: @lichtwerk
Added subscriber: @OmarEmaraDev
Changed status from 'Needs Triage' to: 'Needs User Info'
It seems the problem is in the shrink-wrap constraint on some of the bones of the mouth, where their target is probably not evaluated because it is not visible. However, once it updates, I can no longer reproduce the issue.
I also feel like there is an undetected dependency cycle here, the helper beard mesh is deformed on the rig and the rig is shrink-wrapped on the helper.
You say that this happens in many files, can you create a simplified file where this happens to make debugging easier?
Not in front of my computer atm (national holiday), so was there a change in behavior between 3.0.1 and 3.1.2 for you @OmarEmaraDev?
@lichtwerk Yes, it works in 3.0 and doesn't in 3.1. So I guess we can bisect it.
Bisected to
a230445cae.Changed status from 'Needs User Info' to: 'Confirmed'
It would still be good to have a simpler file to debug this, but since we found the culprit, I will consider this confirmed.
Added subscriber: @Sergey
@Sergey: is this expected behavior? If not, it is a regression
Well, actually, to get clarification, I will dare setting this to High Priority (since it looks like a regression), could very well be lowered again.
Multiple modifiers failing when deactivating/activating collectionsto Regression: Multiple modifiers failing when deactivating/activating collectionsThis issue was referenced by
e5c65709a2Changed status from 'Confirmed' to: 'Resolved'
You guys seriously are phenomenal!