Linked objects jumping around during render #72820

New Issue

stephen thomas · 2019-12-31T13:35:44+01:00

stephen thomas commented

2019-12-31 13:35:44 +01:00

System Information
Operating system: Ubuntu 19.10 and macOS Catalina
Graphics card: RTX 2080 ti

Blender Version
Broken: 2.81 onwards
Worked: 2.80

Short description of error
Armatured collections linked into an animation file are jumping around at render time (see the attached video).

Exact steps for others to reproduce the error

Open 'linking-bug-animation.blend'
Render animation

The bug is random, sometimes the linked objects will jump on a frame, sometimes they won't. We've been working around this bug by re-rendering frames. The bug occurs with both Cycles and Eevee.

The blend files are stripped down versions of project files currently being worked on. I've left the assets that were having issues in the project, replacing the models with simple meshes. Assets that weren't jumping around at render time have been removed. All linking is relative and using the proxy armature workflow, not the new override method.

The only difference I can see between the jumping and the non-jumping assets is the number of collections being linked in from a single blend file. The 'molecules.blend and 'plane.blend' contain several different collections being linked in and were the only things jumping around at render time. Saying that though, I've removed all but one of the plane collection links in 'linking-bug-animation.blend' and the plane still jumps.

linking-bug-ani.mov
blender-jumping-bug.zip

**System Information** Operating system: Ubuntu 19.10 and macOS Catalina Graphics card: RTX 2080 ti **Blender Version** Broken: 2.81 onwards Worked: 2.80 **Short description of error** Armatured collections linked into an animation file are jumping around at render time (see the attached video). **Exact steps for others to reproduce the error** - Open 'linking-bug-animation.blend' - Render animation The bug is random, sometimes the linked objects will jump on a frame, sometimes they won't. We've been working around this bug by re-rendering frames. The bug occurs with both Cycles and Eevee. The blend files are stripped down versions of project files currently being worked on. I've left the assets that were having issues in the project, replacing the models with simple meshes. Assets that weren't jumping around at render time have been removed. All linking is relative and using the proxy armature workflow, not the new override method. The only difference I can see between the jumping and the non-jumping assets is the number of collections being linked in from a single blend file. The 'molecules.blend and 'plane.blend' contain several different collections being linked in and were the only things jumping around at render time. Saying that though, I've removed all but one of the plane collection links in 'linking-bug-animation.blend' and the plane still jumps. [linking-bug-ani.mov](https://archive.blender.org/developer/F8253392/linking-bug-ani.mov) [blender-jumping-bug.zip](https://archive.blender.org/developer/F8253393/blender-jumping-bug.zip)

stephen thomas commented

2019-12-31 13:35:44 +01:00

Added subscriber: @stephenthomas

ronsn commented

2019-12-31 20:39:25 +01:00

Added subscriber: @ronsn

ronsn commented

2019-12-31 20:39:25 +01:00

I can confirm this issue on Linux (Ubuntu 18.04) too and it behaves different depending on if you render at 50% resolution, or as image sequence, ...
This issue was caused by this Git commit: 6183688c3560100dc1dcce3354cb622a135bc275 (6183688c35)

–––––––––––––––––––––––––––––––
System Information
Operating system: Linux-5.0.0-37-generic-x86_64-with-debian-buster-sid 64 Bits
Graphics card: GeForce GTX 1660 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 435.21

Blender Version
Broken: version: 2.81 (sub 15), branch: master, commit date: 2019-10-18 14:06, hash: 6183688c35
Worked: version: 2.81 (sub 15), branch: master, commit date: 2019-10-18 11:29, hash: 725b59d9b4

I can confirm this issue on Linux (Ubuntu 18.04) too and it behaves different depending on if you render at 50% resolution, or as image sequence, ... This issue was caused by this Git commit: `6183688c3560100dc1dcce3354cb622a135bc275` (6183688c35) ––––––––––––––––––––––––––––––– **System Information** Operating system: Linux-5.0.0-37-generic-x86_64-with-debian-buster-sid 64 Bits Graphics card: GeForce GTX 1660 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 435.21 **Blender Version** **Broken**: version: 2.81 (sub 15), branch: master, commit date: 2019-10-18 14:06, hash: `6183688c35` **Worked**: version: 2.81 (sub 15), branch: master, commit date: 2019-10-18 11:29, hash: `725b59d9b4`

ronsn commented

2020-01-01 05:31:42 +01:00

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

blender-admin commented

2020-01-02 16:45:18 +01:00

This issue was referenced by 2e06a6bec3

This issue was referenced by 2e06a6bec3f5ed078a544dea9c4f842e403abbc0

Sergey Sharybin commented

2020-01-02 16:48:01 +01:00

Changed status from 'Confirmed' to: 'Resolved'

Sergey Sharybin closed this issue

2020-01-02 16:48:01 +01:00

Sergey Sharybin self-assigned this 2020-01-02 16:48:01 +01:00

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Linked objects jumping around during render #72820