Flickers of volumetrics in blender internal render #41594

New Issue

brothermechanic · 2014-08-26T16:59:48+02:00

brothermechanic commented

2014-08-26 16:59:48 +02:00

System Information
Operating system and graphics card
Windows 7 64 bit GTX780
Blender Version
Broken: 2.71 and above

Short description of error
It is flickers on cloud volumetrics
Exact steps for others to reproduce the error
flickers.zip.

**System Information** Operating system and graphics card Windows 7 64 bit GTX780 **Blender Version** Broken: 2.71 and above **Short description of error** It is flickers on cloud volumetrics **Exact steps for others to reproduce the error** [flickers.zip](https://archive.blender.org/developer/F106852/flickers.zip).

brothermechanic commented

2014-08-26 16:59:48 +02:00

Changed status to: 'Open'

brothermechanic commented

2014-08-26 16:59:48 +02:00

Added subscriber: @brothermechanic

Campbell Barton commented

2014-08-29 10:13:27 +02:00

Added subscriber: @ideasman42

Campbell Barton commented

2014-08-29 10:13:27 +02:00

This looks to be caused by using the random integrator.

this could be made to use the same random seed every time, but you will likely still get flickering with camera motion. so not sure if theres some good solution here besides reducing the random value (which increases stepping)

This looks to be caused by using the random integrator. this could be made to use the same random seed every time, but you will likely still get flickering with camera motion. so not sure if theres some good solution here besides reducing the random value (which increases stepping)

brothermechanic commented

2014-08-29 15:12:30 +02:00

exactly!
thank you!

but, with constant integrator i have long render time

exactly! thank you! but, with constant integrator i have long render time

Bastien Montagne commented

2014-08-31 11:50:45 +02:00

Added subscriber: @mont29

Brecht Van Lommel commented

2014-08-31 14:55:18 +02:00

Added subscriber: @brecht

Brecht Van Lommel commented

2014-08-31 14:55:18 +02:00

The randomized steps size needs many more AA samples to resolve the noise, and Blender Internal only supports up to 16. This file has it set to 8, so it could be increased still, but it's not going to be enough.

Sergey Sharybin commented

2014-09-18 14:14:56 +02:00

Changed status from 'Open' to: 'Archived'

Sergey Sharybin closed this issue

2014-09-18 14:14:56 +02:00

Sergey Sharybin self-assigned this 2014-09-18 14:14:56 +02:00

Sergey Sharybin commented

2014-09-18 14:14:56 +02:00

I'm not really sure whether it possible to reach convergence without increasing render time comparing with random integrator with few samples.

In any way, wouldn't consider this a bug, just one of TODOs in the BI volume area, mentioned this report from there: http://wiki.blender.org/index.php/Dev:2.5/Source/Development/Todo/Render#Volume_Rendering

Thanks for the report, but closing it now.

I'm not really sure whether it possible to reach convergence without increasing render time comparing with random integrator with few samples. In any way, wouldn't consider this a bug, just one of TODOs in the BI volume area, mentioned this report from there: http://wiki.blender.org/index.php/Dev:2.5/Source/Development/Todo/Render#Volume_Rendering Thanks for the report, but closing it now.

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Flickers of volumetrics in blender internal render #41594