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Sat, Oct 17

Nick Dorn (Nubnubbud) added a comment to T81258: Cycles Volumetric flickering when camera is inside volume.

@Nick Dorn (Nubnubbud)

The vdb file is missing from your test file ;)

sorry!
after some confusion, then research I realized you can't pack .vdb files into blender files for sending. This is a zip file with the single frame of data it needs.

Sat, Oct 17, 1:51 PM · Render & Cycles, BF Blender

Fri, Oct 16

Nick Dorn (Nubnubbud) added a comment to T81258: Cycles Volumetric flickering when camera is inside volume.

@Richard Antalik (ISS) here you go. The issue happens in both GPU and CPU, so you can use either. This just has the simulation frame I used for that animation packed in. Note how extreme I made the shader in order to make the issue visible without using an alpha mask. I checked your file, and when I used my shader on it, your issue, with the "flickering density" became my issue with the "pulsing shadows". I can only assume it looks like flickering because in your cases the clouds are so small, the "density gap" passes over them in only a frame or two. The smoke ball is about 1.5x the size of your entire cube, and I think it's related to raymarching

Fri, Oct 16, 2:23 AM · Render & Cycles, BF Blender

Thu, Oct 15

Nick Dorn (Nubnubbud) added a comment to T81258: Cycles Volumetric flickering when camera is inside volume.

could this be related to/the same bug I reported? they've both been in blender for quite some time, I feel it likely has the same or a related cause. Because the alpha channel makes it so much more noticeable, it probably has to do with some kind of uneven sample distribution, where rays are more likely to return a value right at the end of a step, or are less likely to right after one. This makes the volume react as if it had bands of density. Can you confirm if it is only happening when the camera is inside the volume for you?

Thu, Oct 15, 12:02 AM · Render & Cycles, BF Blender

Wed, Oct 14

Nick Dorn (Nubnubbud) updated the task description for T56925: Cycles produces banded render artifacts in dense or sharp volume renders..
Wed, Oct 14, 11:57 PM · Render & Cycles, Cycles

Tue, Oct 13

Nick Dorn (Nubnubbud) updated the task description for T56925: Cycles produces banded render artifacts in dense or sharp volume renders..
Tue, Oct 13, 1:50 PM · Render & Cycles, Cycles

Sep 9 2020

Nick Dorn (Nubnubbud) updated the task description for T56925: Cycles produces banded render artifacts in dense or sharp volume renders..
Sep 9 2020, 11:40 PM · Render & Cycles, Cycles
Nick Dorn (Nubnubbud) added a comment to T56925: Cycles produces banded render artifacts in dense or sharp volume renders..

renamed for clarity of scope and succinctness- the description should probably be where the supposed cause or influencing variables go, not the title, and it was overly redundant. Apologies for the multiple edits- kept finding out of date information, files, and redundant text, and my current test file was far better at exposing the bug/artifact. >

Sep 9 2020, 11:38 PM · Render & Cycles, Cycles
Nick Dorn (Nubnubbud) renamed T56925: Cycles produces banded render artifacts in dense or sharp volume renders. from Cycles does not appear to treat step boundaries vs between step boundaries homogeneously in volumes, produces render artifacts. to Cycles produces banded render artifacts in dense or sharp volume renders..
Sep 9 2020, 11:30 PM · Render & Cycles, Cycles
Nick Dorn (Nubnubbud) updated the task description for T56925: Cycles produces banded render artifacts in dense or sharp volume renders..
Sep 9 2020, 11:25 PM · Render & Cycles, Cycles
Nick Dorn (Nubnubbud) updated the task description for T56925: Cycles produces banded render artifacts in dense or sharp volume renders..
Sep 9 2020, 11:18 PM · Render & Cycles, Cycles

Dec 28 2019

Nick Dorn (Nubnubbud) updated the task description for T56925: Cycles produces banded render artifacts in dense or sharp volume renders..
Dec 28 2019, 8:34 AM · Render & Cycles, Cycles

Jan 5 2019

Nick Dorn (Nubnubbud) created T60191: F2 Addon throws exception when making multiple faces between a face and a bare edge.
Jan 5 2019, 9:54 AM · Add-ons (Community)

Sep 26 2018

Nick Dorn (Nubnubbud) updated the task description for T56925: Cycles produces banded render artifacts in dense or sharp volume renders..
Sep 26 2018, 1:06 PM · Render & Cycles, Cycles
Nick Dorn (Nubnubbud) added a project to T56925: Cycles produces banded render artifacts in dense or sharp volume renders.: Rendering.
Sep 26 2018, 1:00 PM · Render & Cycles, Cycles
Nick Dorn (Nubnubbud) created T56925: Cycles produces banded render artifacts in dense or sharp volume renders..
Sep 26 2018, 12:59 PM · Render & Cycles, Cycles