(When Cycles motion blur is on) Weird rendering error on the frame when this glitchy mesh object is in scale of 0,0,0 #73985

New Issue

Manu Järvinen · 2020-02-18T20:02:52+01:00

Manu Järvinen commented

2020-02-18 20:02:52 +01:00

System Information
Operating system: Linux-5.3.0-26-generic-x86_64-with-debian-buster-sid 64 Bits
Graphics card: GeForce GTX 780 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 440.44

Blender Version
Broken: version: 2.82 (sub 7), branch: master, commit date: 2020-02-12 16:20, hash: 77d23b0bd7
Broken: version: 2.83 alpha today's Linux build (2020-02-18)
Worked: Official 2.82 Windows

Short description of error
When I render with Cycles Motion Blur, in the Linux builds I get this weird rendering error when rendering the frame 81 (when the object 'blob' is in scale 0,0,0)
The next frame 82 renders nicely when 'blob's scale keyframes are other than 0
If I animate the 'blob' object's scale back to 0 say, in frame 83, I again get this weird rendering error, you see the transparent alpha even if you shouldn't (image1 below)

image1:

The frame 81 should look like this (image below), no alpha transparent background around (this one is rendered with no motion blur on)

Also, the said 'blob' object has this weird vertice glitch when rotated and panned around in edit mode (it was made with Dobarro's voxel retopo in sculpt mode)
It's a GIF animation:

Exact steps for others to reproduce the error

open the attached .blend
render the frame 81

With the Motion Blur unchecked, nothing of this happens, everything goes smoothly. Also in Windows builds even with motion blur on (Yes, confirmed. In Windows Blender 2.82 Official I can't reproduce this, everything works fine, also there are no viewport glitches in the 'blob' object in edit mode.)

bug_report5.blend

**System Information** Operating system: Linux-5.3.0-26-generic-x86_64-with-debian-buster-sid 64 Bits Graphics card: GeForce GTX 780 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 440.44 **Blender Version** Broken: version: 2.82 (sub 7), branch: master, commit date: 2020-02-12 16:20, hash: `77d23b0bd7` Broken: version: 2.83 alpha today's Linux build (2020-02-18) Worked: Official 2.82 Windows **Short description of error** When I render with Cycles Motion Blur, in the Linux builds I get this weird rendering error when rendering the frame 81 (when the object 'blob' is in scale 0,0,0) The next frame 82 renders nicely when 'blob's scale keyframes are other than 0 If I animate the 'blob' object's scale back to 0 say, in frame 83, I again get this weird rendering error, you see the transparent alpha even if you shouldn't (image1 below) image1: ![image.png](https://archive.blender.org/developer/F8348507/image.png) The frame 81 should look like this (image below), no alpha transparent background around (this one is rendered with no motion blur on) ![image.png](https://archive.blender.org/developer/F8348518/image.png) Also, the said 'blob' object has this weird vertice glitch when rotated and panned around in edit mode (it was made with Dobarro's voxel retopo in sculpt mode) It's a GIF animation: ![viewport_mesh_glitch.gif](https://archive.blender.org/developer/F8348527/viewport_mesh_glitch.gif) **Exact steps for others to reproduce the error** - open the attached .blend - render the frame 81 With the Motion Blur unchecked, nothing of this happens, everything goes smoothly. Also in Windows builds even with motion blur on (Yes, confirmed. In Windows Blender 2.82 Official I can't reproduce this, everything works fine, also there are no viewport glitches in the 'blob' object in edit mode.) [bug_report5.blend](https://archive.blender.org/developer/F8348491/bug_report5.blend)

Manu Järvinen commented

2020-02-18 20:02:52 +01:00

Added subscriber: @ManuJarvinen

Germano Cavalcante commented

2020-02-20 13:30:07 +01:00

Added subscriber: @mano-wii

Germano Cavalcante commented

2020-02-20 13:30:07 +01:00

Is this problem seen rendering with both the CPU and GPU?
(Maybe it's an NVidia problem and not Linux).

Is this problem seen rendering with both the CPU and GPU? (Maybe it's an NVidia problem and not Linux).

Manu Järvinen commented

2020-02-24 06:52:08 +01:00

Yes the error happens both on cpu and gpu on Linux.
And it works like it should on cpu and gpu on Windows.
Just tested this
But it has something to do with the dense 'blob' object. If I delete it and use UVsphere instead, the error doesn't happen...

Yes the error happens both on cpu and gpu on Linux. And it works like it should on cpu and gpu on Windows. Just tested this But it has something to do with the dense 'blob' object. If I delete it and use UVsphere instead, the error doesn't happen...

Ankit Meel commented

2020-04-02 10:17:11 +02:00

Added subscriber: @ankitm

Ankit Meel commented

2020-04-02 10:17:11 +02:00

#75238 (Hair particles with motion blur crash)

Philipp Oeser commented

2020-11-26 18:08:33 +01:00

Added subscriber: @lichtwerk

Philipp Oeser commented

2020-11-26 18:08:33 +01:00

Changed status from 'Needs Triage' to: 'Needs User Info'

Philipp Oeser commented

2020-11-26 18:08:33 +01:00

Cannot reproduce here

**System Information**
Operating system: Linux-5.9.8-200.fc33.x86_64-x86_64-with-fedora-33-Thirty_Three 64 Bits
Graphics card: GeForce GTX 970M/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 455.45.01
version: 2.91.0, branch: master, commit date: 2020-11-25 08:34, hash: `rB0f45cab862b8`

@ManuJarvinen: does this still happen for you in the new 2.91 release or fresh builds from https://builder.blender.org/download/?
If this still fails: which GPU driver version are you on atm.?

Cannot reproduce here ``` **System Information** Operating system: Linux-5.9.8-200.fc33.x86_64-x86_64-with-fedora-33-Thirty_Three 64 Bits Graphics card: GeForce GTX 970M/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 455.45.01 version: 2.91.0, branch: master, commit date: 2020-11-25 08:34, hash: `rB0f45cab862b8` ``` @ManuJarvinen: does this still happen for you in the new 2.91 release or fresh builds from https://builder.blender.org/download/? If this still fails: which GPU driver version are you on atm.?

Manu Järvinen commented

2020-11-26 18:33:17 +01:00

@lichtwerk : Actually no, not happening anymore :) The motion-blur thing I mean. Seems to be fixed.

But this glitch happens still:
(GIF animation:)

However, yes, there is a separate raport made out of it:
https://developer.blender.org/T77731

Thank you!
mj

@lichtwerk : Actually no, not happening anymore :) The motion-blur thing I mean. Seems to be fixed. But this glitch happens still: (GIF animation:) ![ORBITglitches.gif](https://archive.blender.org/developer/F9382310/ORBITglitches.gif) However, yes, there is a separate raport made out of it: https://developer.blender.org/T77731 Thank you! mj

Philipp Oeser commented

2020-11-27 09:45:39 +01:00

Changed status from 'Needs User Info' to: 'Resolved'

Philipp Oeser closed this issue

2020-11-27 09:45:39 +01:00

Philipp Oeser self-assigned this 2020-11-27 09:45:39 +01:00

Philipp Oeser commented

2020-11-27 09:45:39 +01:00

Thx getting back! Cannot reproduce the vertex-color-glitch.

To keep our sanity here [and to follow the 'one-issue-per-report" rule] I would like to ask to report that issue separately.

Will close the motion-blur thingie.

Thx getting back! Cannot reproduce the vertex-color-glitch. To keep our sanity here [and to follow the 'one-issue-per-report" rule] I would like to ask to report that issue separately. Will close the motion-blur thingie.

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(When Cycles motion blur is on) Weird rendering error on the frame when this glitchy mesh object is in scale of 0,0,0 #73985