particles + motion blur cause artifacts #53334

New Issue

Marcin Twarowski · 2017-11-16T13:08:01+01:00

Marcin Twarowski commented

2017-11-16 13:08:01 +01:00

Win 10, GTX1080, i7-7700K 4.20Ghz
Blender 2.79, 2.78c, Cycles

See attached file. There are baked particles included. Hit render. There's a clear shadowy artifact across the mesh in Cycles render. The problem does not appear in Cycles preview.

The problem is gone when layer with particles is hidden. The problem is also gone when motion blur is turned off.

When I try to render on CPU, Blender crashes.
win10_particles_motion_blur_bug.zip

Win 10, GTX1080, i7-7700K 4.20Ghz Blender 2.79, 2.78c, Cycles See attached file. There are baked particles included. Hit render. There's a clear shadowy artifact across the mesh in Cycles render. The problem does not appear in Cycles preview. ![gtx1080_2.79_win10.jpg](https://archive.blender.org/developer/F1143308/gtx1080_2.79_win10.jpg) The problem is gone when layer with particles is hidden. The problem is also gone when motion blur is turned off. ![win7_gtx970.jpg](https://archive.blender.org/developer/F1143311/win7_gtx970.jpg) When I try to render on CPU, Blender crashes. [win10_particles_motion_blur_bug.zip](https://archive.blender.org/developer/F1143302/win10_particles_motion_blur_bug.zip)

Marcin Twarowski commented

2017-11-16 13:08:02 +01:00

Changed status to: 'Open'

Marcin Twarowski commented

2017-11-16 13:08:02 +01:00

Added subscriber: @MarcinTwarowski

Steffen Dünner commented

2017-11-16 13:57:44 +01:00

Added subscriber: @SteffenD

ronan ducluzeau commented

2017-11-16 13:58:33 +01:00

Added subscriber: @zeauro

ronan ducluzeau commented

2017-11-16 13:58:33 +01:00

I confirm the bug happens on ubuntu 16.04, too. 2.79 and master 556b13f

Problem is not present with CPU rendering. It only occurs when GPU is involved.
It is more obvious with CPU+GPU.

I confirm the bug happens on ubuntu 16.04, too. 2.79 and master 556b13f Problem is not present with CPU rendering. It only occurs when GPU is involved. It is more obvious with CPU+GPU.

Marcin Twarowski changed title from ~~particles + motion blur cause artifacts on Windows 10~~ to particles + motion blur cause artifacts

2017-12-02 11:54:03 +01:00

Marcin Twarowski commented

2019-02-07 12:32:28 +01:00

It seems to be fixed in 2.80.

Philipp Oeser commented

2020-01-08 18:26:54 +01:00

Added subscriber: @lichtwerk

Philipp Oeser commented

2020-01-08 18:26:54 +01:00

In #53334#615304, @MarcinTwarowski wrote:
It seems to be fixed in 2.80.

I can still see differences in GPU vs CPU tiles:

> In #53334#615304, @MarcinTwarowski wrote: > It seems to be fixed in 2.80. I can still see differences in GPU vs CPU tiles: ![image.png](https://archive.blender.org/developer/F8266312/image.png)

Germano Cavalcante commented

2020-01-24 16:03:23 +01:00

Added subscriber: @mano-wii

Germano Cavalcante commented

2020-01-24 16:03:23 +01:00

Changed status from 'Confirmed' to: 'Resolved'

Germano Cavalcante closed this issue

2020-01-24 16:03:23 +01:00

Germano Cavalcante self-assigned this 2020-01-24 16:03:23 +01:00

Germano Cavalcante commented

2020-01-24 16:03:23 +01:00

I can also confirm that the original problem seems to have already been solved. So I will close this report.
I see no difference in titles when rendering with OpenCL CPU + GPU, if this problem still exists it is already being dealt with in another report.

Operating system: Windows-10-10.0.18941 64 Bits
Graphics card: Radeon (TM) RX 480 Graphics ATI Technologies Inc. 4.5.13559 Core Profile Context 26.20.12028.2

I can also confirm that the original problem seems to have already been solved. So I will close this report. I see no difference in titles when rendering with OpenCL CPU + GPU, if this problem still exists it is already being dealt with in another report. **Operating system:** Windows-10-10.0.18941 64 Bits **Graphics card:** Radeon (TM) RX 480 Graphics ATI Technologies Inc. 4.5.13559 Core Profile Context 26.20.12028.2

Philipp Oeser commented

2020-01-24 16:47:03 +01:00

Changed status from 'Resolved' to: 'Confirmed'

Philipp Oeser reopened this issue

2020-01-24 16:47:03 +01:00

Philipp Oeser commented

2020-01-24 16:47:03 +01:00

I can still see differences in GPU vs CPU tiles CUDA 970m + Intel Core i7-6700

System Information
Operating system: Linux-5.3.12-200.fc30.x86_64-x86_64-with-fedora-30-Thirty 64 Bits
Graphics card: GeForce GTX 970M/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 440.44

if this problem still exists it is already being dealt with in another report.

which one?

(@mano-wii : feel free to close again, or merge into the other report, but will reopen for the time being...)

@MarcinTwarowski : is this resolved for you?

I can still see differences in GPU vs CPU tiles CUDA 970m + Intel Core i7-6700 **System Information** Operating system: Linux-5.3.12-200.fc30.x86_64-x86_64-with-fedora-30-Thirty 64 Bits Graphics card: GeForce GTX 970M/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 440.44 > if this problem still exists it is already being dealt with in another report. which one? (@mano-wii : feel free to close again, or merge into the other report, but will reopen for the time being...) @MarcinTwarowski : is this resolved for you?

Marcin Twarowski commented

2020-01-27 08:39:57 +01:00

In 2.83 I could not reproduce neither with GPU nor CPU.

Philipp Oeser commented

2020-05-11 16:49:56 +02:00

Added subscriber: @dfelinto

Philipp Oeser commented

2020-05-11 16:49:56 +02:00

@dfelinto: hm, this might be something different, but I am still seeing this:

GPU+CPU hybrid rendering

with object Cylinder.352 hidden

with object Cylinder.352 showing

Since this seems to solved for @MarcinTwarowski, I am unsure what I am seeing here...

@dfelinto: hm, this might be something different, but I am still seeing this: GPU+CPU hybrid rendering with object `Cylinder.352` hidden ![image.png](https://archive.blender.org/developer/F8528266/image.png) with object `Cylinder.352` showing ![image.png](https://archive.blender.org/developer/F8528270/image.png) Since this seems to solved for @MarcinTwarowski, I am unsure what I am seeing here...

Jacques Lucke commented

2020-09-15 11:43:43 +02:00

Added subscriber: @JacquesLucke

Jacques Lucke commented

2020-09-15 11:43:43 +02:00

@lichtwerk sounds like you have a separate issue. Can you create a separate report for it?

Philipp Oeser commented

2020-09-15 12:14:23 +02:00

Changed status from 'Confirmed' to: 'Resolved'

Philipp Oeser closed this issue

2020-09-15 12:14:23 +02:00

Philipp Oeser commented

2020-09-15 12:14:23 +02:00

In #53334#1015998, @JacquesLucke wrote:
@lichtwerk sounds like you have a separate issue. Can you create a separate report for it?

OK, will see if I can come up with something nice and simple to reproduce.
Closing this report then.

> In #53334#1015998, @JacquesLucke wrote: > @lichtwerk sounds like you have a separate issue. Can you create a separate report for it? OK, will see if I can come up with something nice and simple to reproduce. Closing this report then.

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particles + motion blur cause artifacts #53334