Parenting with automatic weight very slow #53494

New Issue

Francesco Pizzo · 2017-12-06T23:06:06+01:00

Francesco Pizzo commented

2017-12-06 23:06:06 +01:00

System Information
Windows 10 PRO, 32 gb ram, RX580

Blender Version
Broken: 2.78 and actual 2.79

Short description of error
I did a mesh in Zbrush, sculpt it with level subdivision 5. Send the mesh to Blender with GoB, automatically GoB import in blender Level 1 mesh (not a problem at all), so want parenting the mesh to my Rigify generated rig, well, this was fine sometime before (I think until release 2.76), but now it took hours or cannot do at all, for parenting the mesh (composed by all quads). Why? Cannot understand what is the problem.

Exact steps for others to reproduce the error
Parenting with automatic an imported mesh from zbrush to rigify generated rig.
here the example file: http://www.mediafire.com/file/a6ylqt59rvyqgq4/Weights+error.zip the mesh don't fit correctly with the bones, but the result doesn't change, blender took a lot of time to parenting the mesh (even if I align correctly the bones to the mesh)

**System Information** Windows 10 PRO, 32 gb ram, RX580 **Blender Version** Broken: 2.78 and actual 2.79 **Short description of error** I did a mesh in Zbrush, sculpt it with level subdivision 5. Send the mesh to Blender with GoB, automatically GoB import in blender Level 1 mesh (not a problem at all), so want parenting the mesh to my Rigify generated rig, well, this was fine sometime before (I think until release 2.76), but now it took hours or cannot do at all, for parenting the mesh (composed by all quads). Why? Cannot understand what is the problem. **Exact steps for others to reproduce the error** Parenting with automatic an imported mesh from zbrush to rigify generated rig. here the example file: http://www.mediafire.com/file/a6ylqt59rvyqgq4/Weights+error.zip the mesh don't fit correctly with the bones, but the result doesn't change, blender took a lot of time to parenting the mesh (even if I align correctly the bones to the mesh)

Francesco Pizzo commented

2017-12-06 23:06:06 +01:00

Changed status to: 'Open'

Francesco Pizzo commented

2017-12-06 23:06:06 +01:00

Added subscriber: @FrancescoPizzo

Jason van Gumster commented

2017-12-13 19:01:26 +01:00

Added subscriber: @JasonvanGumster

Francesco Pizzo commented

2017-12-13 19:40:39 +01:00

Another file if someone wants to test it, this time the armature is correctly lined with the body (some result, took forever for parenting with automatic weight) :
http://www.mediafire.com/file/u3b68fclrg6r3bs/Weights%20error%202.zip

Another file if someone wants to test it, this time the armature is correctly lined with the body (some result, took forever for parenting with automatic weight) : http://www.mediafire.com/file/u3b68fclrg6r3bs/Weights%20error%202.zip

Erick Tukuniata commented

2017-12-13 21:50:02 +01:00

Added subscriber: @ErickNyanduKabongo

Erick Tukuniata commented

2017-12-13 21:50:02 +01:00

No bug here i bind the first mesh in less than 2 min and the second in less the 10 min, i was not checking my watch, those are more how i felt ;)

Short answer will be you have dense mesh Blender is good at it, for a long answer and help ask in Blenderartists.org i can explain more.
Good luck

No bug here i bind the first mesh in less than 2 min and the second in less the 10 min, i was not checking my watch, those are more how i felt ;) Short answer will be you have dense mesh Blender is good at it, for a long answer and help ask in Blenderartists.org i can explain more. Good luck

Francesco Pizzo commented

2017-12-13 23:24:42 +01:00

Thanks very much for your answer Erick, I just open a thread on blender artists. https://blenderartists.org/forum/showthread.php?434552-Parenting-with-automatic-weight-very-slow

Sergey Sharybin commented

2017-12-18 14:44:30 +01:00

Added subscriber: @Sergey

Sergey Sharybin commented

2017-12-18 14:44:30 +01:00

Changed status from 'Open' to: 'Archived'

Sergey Sharybin closed this issue

2017-12-18 14:44:30 +01:00

Sergey Sharybin self-assigned this 2017-12-18 14:44:30 +01:00

Sergey Sharybin commented

2017-12-18 14:44:30 +01:00

Automatic weights requires to solve lots of systems of linear equations, complexity of which depends on number of vertices. Eigen library (which we use for that) does not allow to perform this kind of solution in threads, so it's something to be looked at from our side.

However, this is not considered a bug, but more an optimizaiton. Hence moving to TODO https://wiki.blender.org/index.php/Dev:Source/Development/Todo/Animation#Rigging

Thanks for the report anyway!

Automatic weights requires to solve lots of systems of linear equations, complexity of which depends on number of vertices. Eigen library (which we use for that) does not allow to perform this kind of solution in threads, so it's something to be looked at from our side. However, this is not considered a bug, but more an optimizaiton. Hence moving to TODO https://wiki.blender.org/index.php/Dev:Source/Development/Todo/Animation#Rigging Thanks for the report anyway!

Sergey Sharybin commented

2017-12-18 14:45:09 +01:00

Attaching files here so they are not lost.

Weights error 2.blend
Weights error.zip

Attaching files here so they are not lost. [Weights error 2.blend](https://archive.blender.org/developer/F1442990/Weights_error_2.blend) [Weights error.zip](https://archive.blender.org/developer/F1442989/Weights_error.zip)

Francesco Pizzo commented

2017-12-19 14:27:11 +01:00

Hi,
problem solved. Hi had some windows registry errors, Blender works fine, and stable enough. Reinstalled windows and now parenting is fast as usual.
Thanks

Hi, problem solved. Hi had some windows registry errors, Blender works fine, and stable enough. Reinstalled windows and now parenting is fast as usual. Thanks

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Parenting with automatic weight very slow #53494