Cycles animation render crash in scenes that use VDB cache and Vector pass (fixed in 2.9, request to backport to LTS) #79767

New Issue

Saku Partamies · 2020-08-14T09:34:35+02:00

Saku Partamies commented

2020-08-14 09:34:35 +02:00

System Information
OS: Windows 10 Home
CPU: AMD Ryzen 7 2700X
RAM: 32gb
GPU: Nvidia RTX 2080 8gb

Blender Version
Broken: 2.83.4
Worked: 2.90.0 Beta (fixed by 6ac235a6f7)

Short description of error
VDB animation render crashes always when having Vector AOV (Passes->Data) on for Cycles render. Single VDB file (non-sequence) works with animation render with Vector pass on, but when having VDB sequence, then crash happens. Usually before very start of 1st frame render, but if the VDB sequence has offset, then sometimes 1st frame renders and crash happens just start of 2nd frame render. This happens only for animation renders, single frame renders doesn't crash.

Download this VDB sample (or any other) to use in sample Blender file to reproduce crashes:
https://jangafx.com/software/embergen/download/free-vdb-animations/
File: Simple Fire (65mb)

Sample Blender file: openvdb_anim-crash_02.blend

Exact steps for others to reproduce the error

Load sample VDB file in VDB object.
Change Output path to folder that works with the test system.
Render Animation (CTRL-F12) CRASH
To test and confirm the cause of problem disable Vector pass and re-render

**System Information** OS: Windows 10 Home CPU: AMD Ryzen 7 2700X RAM: 32gb GPU: Nvidia RTX 2080 8gb **Blender Version** Broken: 2.83.4 Worked: 2.90.0 Beta (fixed by 6ac235a6f7) **Short description of error** VDB animation render crashes always when having Vector AOV (Passes->Data) on for Cycles render. Single VDB file (non-sequence) works with animation render with Vector pass on, but when having VDB sequence, then crash happens. Usually before very start of 1st frame render, but if the VDB sequence has offset, then sometimes 1st frame renders and crash happens just start of 2nd frame render. This happens only for animation renders, single frame renders doesn't crash. Download this VDB sample (or any other) to use in sample Blender file to reproduce crashes: https://jangafx.com/software/embergen/download/free-vdb-animations/ File: **Simple Fire (65mb)** **Sample Blender file:** [openvdb_anim-crash_02.blend](https://archive.blender.org/developer/F8779523/openvdb_anim-crash_02.blend) **Exact steps for others to reproduce the error** 1) Load sample VDB file in VDB object. 2) Change Output path to folder that works with the test system. 3) Render Animation (CTRL-F12) **CRASH** 4) To test and confirm the cause of problem disable Vector pass and re-render ![Blender_VDB_crash_vectorpass.JPG](https://archive.blender.org/developer/F8779555/Blender_VDB_crash_vectorpass.JPG)

Saku Partamies commented

2020-08-14 09:34:35 +02:00

Added subscriber: @SakuP

Philipp Oeser commented

2020-08-14 09:51:23 +02:00

Added subscribers: @Jeroen-Bakker, @brecht, @lichtwerk

Philipp Oeser commented

2020-08-14 09:51:23 +02:00

Changed status from 'Needs Triage' to: 'Needs Developer To Reproduce'

Philipp Oeser commented

2020-08-14 09:51:23 +02:00

I am not totally sure how we handle these kinds of reports (since this is fixed in 2.9 by 6ac235a6f7 it is basically a request for backporting a fix to 2.8 LTS, right?)
But I have seen accepted reports like this before, so I will raise awareness to @Jeroen-Bakker, @brecht in this case as well.

I assume this should just get on the list here #77348 (Blender LTS: Maintenance Task 2.83) -- if it can be backported at all, then report closed?

I am not totally sure how we handle these kinds of reports (since this is fixed in 2.9 by 6ac235a6f7 it is basically a request for backporting a fix to 2.8 LTS, right?) But I have seen accepted reports like this before, so I will raise awareness to @Jeroen-Bakker, @brecht in this case as well. I assume this should just get on the list here #77348 (Blender LTS: Maintenance Task 2.83) -- if it can be backported at all, then report closed?

Philipp Oeser changed title from ~~Cycles animation render crash in scenes that use VDB cache and Vector pass~~ to Cycles animation render crash in scenes that use VDB cache and Vector pass (fixed in 2.9, request to backport to LTS)

2020-08-14 09:52:11 +02:00

Philipp Oeser commented

2020-08-14 10:21:25 +02:00

This has been added to the backport list in #77348 (Blender LTS: Maintenance Task 2.83), so I guess @Jeroen-Bakker will close this report when the commit will actually land in the LTS branch

Jeroen Bakker was assigned by Philipp Oeser

2020-08-14 10:22:01 +02:00

Philipp Oeser commented

2020-08-14 10:22:01 +02:00

Changed status from 'Needs Developer To Reproduce' to: 'Confirmed'

Jeroen Bakker commented

2020-08-28 07:56:42 +02:00

Changed status from 'Confirmed' to: 'Resolved'

Jeroen Bakker closed this issue

2020-08-28 07:56:42 +02:00

Jeroen Bakker commented

2020-08-28 07:56:42 +02:00

Will be part of 2.83.6

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Cycles animation render crash in scenes that use VDB cache and Vector pass (fixed in 2.9, request to backport to LTS) #79767