some drivers don't update during animation render #62817
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Reference: blender/blender#62817
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System Information
Operating system: Windows-10-10.0.17134 64 Bits
Graphics card: GeForce GTX 1060 6GB/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 419.17
Blender Version
Broken: version: 2.80 (sub 51), branch: master, commit date: 2019-03-21 00:58, hash:
0bbff8a711
Worked: (optional)
Short description of error
driver put on influence of VertexWeightMix Modifer, and depended on other modifier's parameter updates only on preview but not during animation render
here is the blend file test.blend
and rendered animation to compare
AA0000-0025.mp4
In the rendered animation driver value clearly isn't updated by time.
rendering single frame works fine, as you have to go to that frame first which updates the driver.
Exact steps for others to reproduce the error
Added subscriber: @solartistic
Added subscribers: @Sergey, @lichtwerk
We've got a dependency cycle reported here:
not sure if the second line is really neccessary / could be made working without actually reporting a dependency cycle?
the driver variable wants to pick up a RNA value, so shouldnt neccessarily be dependent on GEOMETRY_EVAL?
(but I am still not too familiar with the DEG, so maybe @Sergey would know right away?)
note: as a workaround, you could (instead of animating one modifier and driving the second one from the first modifier) do the following:
this wont result in a dependency cycle and renders fine, see:
#62817.blend
Added subscriber: @ZedDB
We usually close dependency cycle issues, but I just want to make sure that this is working as intended.
@lichtwerk thanks for providing an alternate fix.
This issue was referenced by
ba2a81bcf1
Changed status from 'Open' to: 'Resolved'
Added subscriber: @gurlaldeep
I am having the same problem with blender 2.82a
@gurlaldeep, the file from this report still seems to work. If you're experiencing an issue please submit a new report with all the information requested.