Drivers dont work in renders #79152

New Issue

Przemysław Rumiński · 2020-07-22T00:38:09+02:00

2020-07-22 00:38:09 +02:00

System Information
Operating system: WINDOWS 10
Graphics card: NIVIDIA GeForce GTX 1050 Ti

Blender Version
Broken: (2.83)
Worked: (sadly i dont know)

Short description of error
Local z rotation of one bone drives the local z location of a different bone, z location doesnt change in the final render (everything works fine in the viewport)
Exact steps for others to reproduce the error

delete the cube, add bone, rotate it by (x) 90 degrees, extrude on the z axis downwards, add a plane on the connection between the bones, extrude it downward, parent that plane to the bone.001, add a driver to the z location on the first bone, any expression, object: armature ; bone: bone.001 ; type: z rotation ; space: local space (everything else is default) animate the bone.001 rotating on the local z axis{F8712356}, render

Based on the default startup or an attached .blend file (as simple as possible).

**System Information** Operating system: WINDOWS 10 Graphics card: NIVIDIA GeForce GTX 1050 Ti **Blender Version** Broken: (2.83) Worked: (sadly i dont know) **Short description of error** Local z rotation of one bone drives the local z location of a different bone, z location doesnt change in the final render (everything works fine in the viewport) **Exact steps for others to reproduce the error** ``` delete the cube, add bone, rotate it by (x) 90 degrees, extrude on the z axis downwards, add a plane on the connection between the bones, extrude it downward, parent that plane to the bone.001, add a driver to the z location on the first bone, any expression, object: armature ; bone: bone.001 ; type: z rotation ; space: local space (everything else is default) animate the bone.001 rotating on the local z axis{F8712356}, render ``` Based on the default startup or an attached .blend file (as simple as possible).

Przemysław Rumiński commented

2020-07-22 00:38:09 +02:00

Added subscriber: @BENOM

Bent Hillerkus commented

2020-07-22 00:42:02 +02:00

Added subscriber: @bent

Richard Antalik commented

2020-07-22 03:36:53 +02:00

Added subscriber: @iss

Richard Antalik commented

2020-07-22 03:36:53 +02:00

Changed status from 'Needs Triage' to: 'Needs User Info'

Richard Antalik commented

2020-07-22 03:36:53 +02:00

Please upload example file

Przemysław Rumiński commented

2020-07-22 09:22:49 +02:00

bug.blend Oh sorry I thought I attached it

[bug.blend](https://archive.blender.org/developer/F8713282/bug.blend) Oh sorry I thought I attached it

Bent Hillerkus commented

2020-07-22 14:19:03 +02:00

As far as I can tell you've got a dependency cycle because bone relies on bone.001, which itself relies on bone, because it it bone's child. It seems that Blender doesn't check which properties depend on each other, but only which objects do (I've tried uparenting them and adding a copy location constraint on bone.001).

bug.blend

I've had a similar issue a week ago .

As far as I can tell you've got a dependency cycle because bone relies on bone.001, which itself relies on bone, because it it bone's child. It seems that Blender doesn't check which properties depend on each other, but only which objects do (I've tried uparenting them and adding a copy location constraint on bone.001). [bug.blend](https://archive.blender.org/developer/F8713668/bug.blend) I've had a similar issue [a week ago ](https://developer.blender.org/T78893).

Richard Antalik commented

2020-07-23 04:16:16 +02:00

Changed status from 'Needs User Info' to: 'Archived'

Richard Antalik closed this issue

2020-07-23 04:16:16 +02:00

Richard Antalik self-assigned this 2020-07-23 04:16:16 +02:00

Richard Antalik commented

2020-07-23 04:16:16 +02:00

Indeed there is dependency cycle (in system console)

Dependency cycle detected:
  OBArmature/Bone/BONE_LOCAL() depends on
  OBArmature/Parameters Component/DRIVER(pose.bones["Bone"].location) via 'Driver -> Driven Property'
  OBArmature/Bone.001/BONE_DONE() via 'Bone Target -> Driver'
  OBArmature/Bone.001/BONE_READY() via 'Ready -> Done'
  OBArmature/Bone.001/BONE_POSE_PARENT() via 'Pose -> Ready'
  OBArmature/Bone/BONE_DONE() via 'Parent Bone -> Child Bone'
  OBArmature/Bone/BONE_READY() via 'Ready -> Done'
  OBArmature/Bone/BONE_POSE_PARENT() via 'Pose -> Ready'
  OBArmature/Bone/BONE_LOCAL() via 'Bone Local - Bone Pose'
Detected 1 dependency cycles

You have to resolve this to render result correctly

Indeed there is dependency cycle (in system console) ``` Dependency cycle detected: OBArmature/Bone/BONE_LOCAL() depends on OBArmature/Parameters Component/DRIVER(pose.bones["Bone"].location) via 'Driver -> Driven Property' OBArmature/Bone.001/BONE_DONE() via 'Bone Target -> Driver' OBArmature/Bone.001/BONE_READY() via 'Ready -> Done' OBArmature/Bone.001/BONE_POSE_PARENT() via 'Pose -> Ready' OBArmature/Bone/BONE_DONE() via 'Parent Bone -> Child Bone' OBArmature/Bone/BONE_READY() via 'Ready -> Done' OBArmature/Bone/BONE_POSE_PARENT() via 'Pose -> Ready' OBArmature/Bone/BONE_LOCAL() via 'Bone Local - Bone Pose' Detected 1 dependency cycles ``` You have to resolve this to render result correctly

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Drivers dont work in renders #79152