Regression: Failure to render stereoscopy correctly in background (rendering of curve objects with cycles and motion blur) #107589

New Issue

Sebastian Gürtler · 2023-05-03T21:56:38+02:00

2023-05-03 21:56:38 +02:00

System Information
Operating system: Linux-5.19.0-41-generic-x86_64-with-glibc2.35 64 Bits
Graphics card: AMD Radeon Vega 8 Graphics (raven, LLVM 15.0.6, DRM 3.47, 5.19.0-41-generic) AMD 4.6 (Core Profile) Mesa 22.2.5

Blender Version
Broken: version: 3.5.1, branch: blender-v3.5-release, commit date: 2023-04-24 18:11, hash: e1ccd9d4a1d3

Caused by b32f5a922f

Short description of error
In stereoscopic rendering with cycles curve objects are missing (mesh objects are fine) for the right eye if motion blur is activated. This only occurs in rendering without GUI via command line.

Exact steps for others to reproduce the error
Create new "General" file
Delete Cube
Add Bezier-Curve
Set Curve Data-Properties: Geometry-Bevel Depth to 0.1 m

Render Properties: Cycles; Motion blur: ON
Output Properties: Stereoscopy ON
Set Framerange from 1 to 1
save as "test.blend"

Render animation from GUI -> works properly
Command line:
$ blender --background test.blend -a

produces a frame without the curve for the right eye.

The bug has similarities to the one reported by @SimeonConzendorf in /blender/blender/issues/70114#issue-38464 several years ago (Version 2.81). The bug seems to have irregularities, I had a similar behaviour in version 3.0.0 where it occured not in every frame in a quite complex scene. But I was not able to reproduce it in a simple way. The uploaded file doesn't reproduce the bug in that version and 3.0.1, but after these in 3.1.0, 3.3.1 and the actual daily build blender-3.6.0-alpha+main.d5fc1b9ba4b8-linux.x86_64-release

I uploaded smaller anaglyph images instead of the separated images for better illustration.

**System Information** Operating system: Linux-5.19.0-41-generic-x86_64-with-glibc2.35 64 Bits Graphics card: AMD Radeon Vega 8 Graphics (raven, LLVM 15.0.6, DRM 3.47, 5.19.0-41-generic) AMD 4.6 (Core Profile) Mesa 22.2.5 **Blender Version** Broken: version: 3.5.1, branch: blender-v3.5-release, commit date: 2023-04-24 18:11, hash: `e1ccd9d4a1d3` Caused by b32f5a922f05989ff129c3d266ebbed14b751e2a **Short description of error** In stereoscopic rendering with cycles curve objects are missing (mesh objects are fine) for the right eye if motion blur is activated. This only occurs in rendering without GUI via command line. **Exact steps for others to reproduce the error** Create new "General" file Delete Cube Add Bezier-Curve Set Curve Data-Properties: Geometry-Bevel Depth to 0.1 m Render Properties: Cycles; Motion blur: ON Output Properties: Stereoscopy ON Set Framerange from 1 to 1 save as "test.blend" Render animation from GUI -> works properly Command line: $ blender --background test.blend -a produces a frame without the curve for the right eye. The bug has similarities to the one reported by @SimeonConzendorf in /blender/blender/issues/70114#issue-38464 several years ago (Version 2.81). The bug seems to have irregularities, I had a similar behaviour in version 3.0.0 where it occured not in every frame in a quite complex scene. But I was not able to reproduce it in a simple way. The uploaded file doesn't reproduce the bug in that version and 3.0.1, but after these in 3.1.0, 3.3.1 and the actual daily build blender-3.6.0-alpha+main.d5fc1b9ba4b8-linux.x86_64-release I uploaded smaller anaglyph images instead of the separated images for better illustration.

With_GUI.png

96 KiB

Background_render.png

94 KiB

test.blend

842 KiB

Sebastian Gürtler added the

labels 2023-05-03 21:56:38 +02:00

Sebastian Gürtler referenced this issue

2023-05-03 22:29:27 +02:00

Particle System missing on right eye when renderd via terminal #70114

Pratik Borhade commented

2023-05-04 14:05:58 +02:00

Thanks for the report. Can confirm.
Guess its a regression (2.83 renders correctly)

Thanks for the report. Can confirm. Guess its a regression (2.83 renders correctly)

Pratik Borhade added

and removed

labels 2023-05-04 14:06:10 +02:00

Pratik Borhade commented

2023-05-04 14:12:40 +02:00

Broke between 3.0 - 3.1 release
I don't really have intermediate ~~commit~~ builds to narrow down further.
@lichtwerk hi, can you check?

Broke between 3.0 - 3.1 release I don't really have intermediate ~~commit~~ builds to narrow down further. @lichtwerk hi, can you check?

Philipp Oeser commented

2023-05-04 15:17:44 +02:00

Broke between bad cc367908cd & good 03015a9b22
(not sure if I can still bisect today -- gotta run sonish -- otherwise will check again tomorrow)

Broke between bad cc367908cd69 & good 03015a9b222e (not sure if I can still bisect today -- gotta run sonish -- otherwise will check again tomorrow)

Philipp Oeser commented

2023-05-05 09:06:36 +02:00

Caused by b32f5a922f

CC @brecht
CC @michael64

Caused by b32f5a922f05989ff129c3d266ebbed14b751e2a CC @brecht CC @michael64

Philipp Oeser changed title from ~~Failure to render stereoscopy correctly in background (rendering of curve objects with cycles and motion blur)~~ to Regression: Failure to render stereoscopy correctly in background (rendering of curve objects with cycles and motion blur)

2023-05-05 09:07:08 +02:00

mcolinpp commented

2023-10-14 18:23:15 +02:00

I almost pulled my hair out tying to figure out why animated extruded curve objects were randomly disappearing when rending my animations of a wall system that "grows" into place. I came across this and was able to confirm that unchecking motion blur did generate the expected result. This is still a problem in th 4.0 BETA. If you need files to see my exact situation, I can provide them.

Lukas Stockner referenced this issue

2024-04-01 20:19:32 +02:00

Particle System missing on right eye when renderd via terminal #70114

Lukas Stockner commented

2024-04-01 20:20:51 +02:00

I'm pretty sure that this is the same issue as in #70114, the suggested fix there also fixes this.

Lukas Stockner self-assigned this 2024-04-01 20:21:04 +02:00

Lukas Stockner referenced this issue

2024-04-12 01:26:26 +02:00

Fix #70114: Cycles: Particle systems missing in headless multiview render #120543

Lukas Stockner referenced this issue from a commit

2024-04-15 17:41:10 +02:00