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Flickers of volumetrics in blender internal render
Closed, InvalidPublic

Description

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

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Event Timeline

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)

exactly!
thank you!

but, with constant integrator i have long render time

Bastien Montagne (mont29) lowered the priority of this task from 90 to Normal.Aug 31 2014, 11:50 AM

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 (sergey) changed the task status from Unknown Status to Unknown Status.Sep 18 2014, 2:14 PM
Sergey Sharybin (sergey) claimed this task.

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.