The driver's scripted expression does not work for animation render. #75828

New Issue

gurlaldeep singh · 2020-04-17T14:21:23+02:00

gurlaldeep singh commented

2020-04-17 14:21:23 +02:00

System Information
Operating system: Windows-10
Graphics card: GeForce GTX 1060 6GB

Blender Version
v2.82a

Short description of error
it works like a charm for preview and image render. However, if I do animation render driver values seem to be stuck on the value for a currently selected frame, not the one being rendered.Desktop 2020.04.17 - 17.15.57.01.mp4

Comp.mp4

report.blend

Exact steps for others to reproduce the error
Open blend file,
preview viewport animation
Render animation (took me 2 seconds)
Compare the result

**System Information** Operating system: Windows-10 Graphics card: GeForce GTX 1060 6GB **Blender Version** v2.82a **Short description of error** it works like a charm for preview and image render. However, if I do animation render driver values seem to be stuck on the value for a currently selected frame, not the one being rendered.[Desktop 2020.04.17 - 17.15.57.01.mp4](https://archive.blender.org/developer/F8478795/Desktop_2020.04.17_-_17.15.57.01.mp4) [Comp.mp4](https://archive.blender.org/developer/F8478807/Comp.mp4) [report.blend](https://archive.blender.org/developer/F8478812/report.blend) **Exact steps for others to reproduce the error** Open blend file, preview viewport animation Render animation (took me 2 seconds) Compare the result

gurlaldeep singh commented

2020-04-17 14:21:23 +02:00

Added subscriber: @gurlaldeep

gurlaldeep singh commented

2020-04-17 14:28:45 +02:00

similar to #62817 but I can't use the empty here
tell me if there is another solution also I can use a constraint but bone with a constraint can't be parent to other bone don't know why

similar to #62817 but I can't use the empty here tell me if there is another solution also I can use a constraint but bone with a constraint can't be parent to other bone don't know why

Brecht Van Lommel commented

2020-04-17 15:11:50 +02:00

Added subscriber: @brecht

Brecht Van Lommel commented

2020-04-17 15:11:50 +02:00

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

Brecht Van Lommel closed this issue

2020-04-17 15:11:50 +02:00

Brecht Van Lommel self-assigned this 2020-04-17 15:11:50 +02:00

Brecht Van Lommel commented

2020-04-17 15:11:50 +02:00

The question on how to build the correct set up here is outside the scope of the bug tracker, rather for one of the community websites:
https://www.blender.org/community/

In general the solution for this type of thing is to add a common parent object.

The question on how to build the correct set up here is outside the scope of the bug tracker, rather for one of the community websites: https://www.blender.org/community/ In general the solution for this type of thing is to add a common parent object.

gurlaldeep singh commented

2020-04-17 15:32:07 +02:00

but if it's working in viewport it should also render?
also it hard to fix because you will not know if it's fixed or not unless you render it

but if it's working in viewport it should also render? also it hard to fix because you will not know if it's fixed or not unless you render it

Brecht Van Lommel commented

2020-04-17 16:21:12 +02:00

In the viewport it will only partially work, with a one frame delay.

Warning users when creating dependency cycles is planned.

In the viewport it will only partially work, with a one frame delay. Warning users when creating dependency cycles is planned.

gurlaldeep singh commented

2020-04-17 17:55:28 +02:00

sorry to disturb you again but I did not understand what you mean by dependency cycles
I will have to understand the problem before I solve it
thanks

sorry to disturb you again but I did not understand what you mean by dependency cycles I will have to understand the problem before I solve it thanks

gurlaldeep singh commented

2020-04-17 22:06:43 +02:00

okay I understand thanks

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The driver's scripted expression does not work for animation render. #75828