Cycles/GPU - A lot of fireflies is this scene (mostly from Buildbot) #48571

New Issue

YAFU · 2016-06-02T14:30:11+02:00

YAFU commented

2016-06-02 14:30:11 +02:00

System Information
Kubuntu Linux 14.04 64bits - GTX 960, 352.79 driver

Blender Version
Broken: mostly from Buildbot Hash 24712b1

            Also a little less on 2.77a

Short description of error
I had a scene used to test slow materials on GPU:
slow_cycles_gpu_with_sss.blend

and I have found that in Blender from Buildbot generates a lot of fireflies in the material including Subsurface Scattering. This does not happen with CPU.
Anyway, I found that this problem also occurs in Blender 2.77a, but this is much less noticeable.

Another thing to note, if I do not use SSS as in this scene:
slow_cycles_gpu.blend

There is also some little more fireflies from Buildbot compared to Blender 2.77a, but also fireflies appear on CPU.

Exact steps for others to reproduce the error
Open the scenes that I have shared and render in GPU / CPU in the corresponding versions of Blender

**System Information** Kubuntu Linux 14.04 64bits - GTX 960, 352.79 driver **Blender Version** Broken: mostly from Buildbot Hash 24712b1 ``` Also a little less on 2.77a ``` **Short description of error** I had a scene used to test slow materials on GPU: [slow_cycles_gpu_with_sss.blend](https://archive.blender.org/developer/F315733/slow_cycles_gpu_with_sss.blend) and I have found that in Blender from Buildbot generates a lot of fireflies in the material including Subsurface Scattering. This does not happen with CPU. Anyway, I found that this problem also occurs in Blender 2.77a, but this is much less noticeable. Another thing to note, if I do not use SSS as in this scene: [slow_cycles_gpu.blend](https://archive.blender.org/developer/F315737/slow_cycles_gpu.blend) There is also some little more fireflies from Buildbot compared to Blender 2.77a, but also fireflies appear on CPU. **Exact steps for others to reproduce the error** Open the scenes that I have shared and render in GPU / CPU in the corresponding versions of Blender

YAFU commented

2016-06-02 14:30:11 +02:00

Changed status to: 'Open'

YAFU commented

2016-06-02 14:30:11 +02:00

Added subscriber: @YAFU

Sergey Sharybin self-assigned this 2016-06-06 15:25:44 +02:00

blender-admin commented

2016-06-06 15:56:22 +02:00

This issue was referenced by 14f9a5aa1d

This issue was referenced by 14f9a5aa1de869b0e611880f38c56708d54b6db3

Sergey Sharybin commented

2016-06-06 15:56:56 +02:00

Changed status from 'Open' to: 'Resolved'

Sergey Sharybin closed this issue

2016-06-06 15:56:56 +02:00

Sergey Sharybin commented

2016-06-06 15:58:27 +02:00

Fixed fireflies on GPU. Remaining ones i think are related on 2cfadec which made homogenous volume integrator to be used (which is correct here) combined with #48383. So as a part of bugfix of this particular report there's not much to do now, other issues hopefully will be fixed with the report i've mentioned above.

Fixed fireflies on GPU. Remaining ones i think are related on 2cfadec which made homogenous volume integrator to be used (which is correct here) combined with #48383. So as a part of bugfix of this particular report there's not much to do now, other issues hopefully will be fixed with the report i've mentioned above.

YAFU commented

2016-06-06 21:00:56 +02:00

Thank you. Now there is no fireflies and CPU and GPU render result match.

blender-admin commented

2016-06-08 11:11:09 +02:00

This issue was referenced by blender/cycles@a44c454e1d

This issue was referenced by blender/cycles@a44c454e1d162d601ec5284663b4adfec46f1467

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Cycles/GPU - A lot of fireflies is this scene (mostly from Buildbot) #48571