How do i solve flickering / noise in a rendered sequence. (Jumping white spots)

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Oliver Navarro Schroeder asked · Jan 11, 2018 at 10:13 PM

How do i solve flickering / noise in a rendered sequence. (Jumping white spots)

Hi,

in a rendered sequence some jumping white spots appeared on a surface that has specular reflection (concrete wall).

How do i get rid of this white spots that are jumping from frame to frame. Is that due to low samples or a specular issue? Obviously these jumping spots can only be seen in a fully rendered sequence. Is there any way to detect those issues before rendering?

If you toggle the attached images you get the effect that can be seen in the animation.

Any help is much appreciated. Thanks!

arnold5 c4dtoa noise

specular-flicker-01.jpg (290.9 KiB)

specular-flicker-02.jpg (290.4 KiB)

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Answer 1 · 2018-05-24T09:44:55Z

Jonathan Cuvelier answered · May 24, 2018 at 09:44 AM

Did you find a solution for this ? I have the same problem. Cranking up the Specular or the AA doesn't work for me....

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Answer 2 · 2018-01-14T22:15:26Z

Oliver Navarro Schroeder answered · Jan 14, 2018 at 10:15 PM

These are the render settings. There are several objects that require higher SSS that are not visible in the above renders. I tried cranking up the Specular, but that did nothing to the white spots.

arnold-settings.png (223.8 KiB)

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Answer 3 · 2018-01-14T14:00:42Z

Max Tarpini answered · Jan 14, 2018 at 02:00 PM

What are your render settings ?

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Answer 4 · 2018-01-13T22:04:20Z

Oliver Navarro Schroeder answered · Jan 13, 2018 at 10:04 PM

Clamping reduces the spots but does not get rid of them. I can turn off specular reflections to avoid the spots, but there must be a better way to deal with this issue, no?

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Answer 5 · 2018-01-12T00:24:36Z

Stephen Blair answered · Jan 12, 2018 at 12:24 AM

Did you try clamping the samples?

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How do i solve flickering / noise in a rendered sequence. (Jumping white spots)

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How do i solve flickering / noise in a rendered sequence. (Jumping white spots)

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