Cycles smoke adaptive domain visibility #39804

New Issue

matthieu barbie · 2014-04-20T12:24:51+02:00

matthieu barbie commented

2014-04-20 12:24:51 +02:00

System Information
Windows 7 X64, dual Zotac Geforce GTX 670 4 Gb

Blender Version
Broken: 2.70, Hash : 4ed16bc
Worked: (optional)

Short description of error
When using smoke adaptive domain with Cycles in closed area, I can see during animation that the adaptive domain is visible as occlusion on the walls.
Here a picture of the effect bug :
http://matthieubarbie.files.wordpress.com/2014/04/capture.png
http://matthieubarbie.files.wordpress.com/2014/04/cycles_fluids-0047.png

Exact steps for others to reproduce the error
The file without smoke cache : https://docs.google.com/file/d/0B2ylYG5fzOLLR0RNWV9Bc01jd3c/edit

**System Information** Windows 7 X64, dual Zotac Geforce GTX 670 4 Gb **Blender Version** Broken: 2.70, Hash : 4ed16bc Worked: (optional) **Short description of error** When using smoke adaptive domain with Cycles in closed area, I can see during animation that the adaptive domain is visible as occlusion on the walls. Here a picture of the effect bug : http://matthieubarbie.files.wordpress.com/2014/04/capture.png http://matthieubarbie.files.wordpress.com/2014/04/cycles_fluids-0047.png **Exact steps for others to reproduce the error** The file without smoke cache : https://docs.google.com/file/d/0B2ylYG5fzOLLR0RNWV9Bc01jd3c/edit

matthieu barbie commented

2014-04-20 12:24:51 +02:00

Changed status to: 'Open'

matthieu barbie self-assigned this 2014-04-20 12:24:51 +02:00

matthieu barbie commented

2014-04-20 12:24:51 +02:00

Added subscriber: @matthieubarbie

Thomas Dinges commented

2014-04-20 13:13:24 +02:00

Added subscriber: @ThomasDinges

Brecht Van Lommel commented

2014-05-06 15:37:44 +02:00

Added subscriber: @brecht

Brecht Van Lommel commented

2014-05-06 15:37:44 +02:00

The problem comes from the wall behind the domain using a different random number pattern. If you take more samples to lower the noise, the problem should go away.

We could try to avoid this problem by not increasing rng_offset when we go through fully transparent surfaces and volumes, though it will still be a problem with partially transparent cases which is what you have with smoke. Using correlated multi jitter should not have this problem but we can't easily make that the default. Not sure how to solve this best yet.

The problem comes from the wall behind the domain using a different random number pattern. If you take more samples to lower the noise, the problem should go away. We could try to avoid this problem by not increasing `rng_offset` when we go through fully transparent surfaces and volumes, though it will still be a problem with partially transparent cases which is what you have with smoke. Using correlated multi jitter should not have this problem but we can't easily make that the default. Not sure how to solve this best yet.

matthieu barbie commented

2014-05-13 16:36:35 +02:00

Hi,

Sorry for the delay, I tried the correlated multi jitter, same result. Of course, will try with no adaptative domain or no domain offset to check too. When tested, I'm coming back to you.

Matt

ps : personal question, smoke rendering will be support by branched path tracing and gpu too ? also does Cycles will support stereoscopic rendering ( 2 buffers rendering at the same time with two frame output) ?

Hi, Sorry for the delay, I tried the correlated multi jitter, same result. Of course, will try with no adaptative domain or no domain offset to check too. When tested, I'm coming back to you. Matt ps : personal question, smoke rendering will be support by branched path tracing and gpu too ? also does Cycles will support stereoscopic rendering ( 2 buffers rendering at the same time with two frame output) ?

matthieu barbie commented

2014-05-14 20:23:41 +02:00

Hi,

Found something else, stranges shadows with volume with adaptive or no-adaptive domain in last build. Below, a link to the datas need to see the bug and the scene used for that :

https://docs.google.com/file/d/0B2ylYG5fzOLLX2g1RzFLV1BnNDg/edit

Matt

Hi, Found something else, stranges shadows with volume with adaptive or no-adaptive domain in last build. Below, a link to the datas need to see the bug and the scene used for that : https://docs.google.com/file/d/0B2ylYG5fzOLLX2g1RzFLV1BnNDg/edit Matt

blender-admin commented

2014-05-29 14:51:02 +02:00

This issue was referenced by 0780f5915b

This issue was referenced by 0780f5915b29ab7102bf1cb8bddd54774161d0d3

Brecht Van Lommel commented

2014-05-29 14:55:04 +02:00

Changed status from 'Open' to: 'Resolved'

Brecht Van Lommel closed this issue

2014-05-29 14:55:04 +02:00

Brecht Van Lommel commented

2014-05-29 14:55:04 +02:00

Closed by commit 0780f5915b.

Closed by commit 0780f5915b.

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Cycles smoke adaptive domain visibility #39804