Scene VDB Limit

[Pete3d]

Hey everyone,

Is there some sort of limit of how many vdbs can be in a scene at once?
As soon as we add more than 5 vdbs to a scene we get a ton of really large and obnoxious noise that we can't seem to find a way to get rid of.

The current workaround is to render the scene in passes with only 5 clouds in each, but this is pretty tedious and time consuming.

Has anyone encountered this before?

The reason is that we're doing some layouts with a bunch of cloud vdbs from Houdini (single frame vdbs, not vdb sequences).

Cheers

[Zdravko.Keremidchiev]

Could you please attach or send us an example scene?

[Paul Oblomov]

Sounds like adaptive lights are on, but no lc used.

[Pete3d]

Here's a test scene.
Not optimised at all but it shows the problem.
Turns out the other vdbs don't even need to be seen by the camera to create the noise, as long as they're active in the scene somewhere.

[Pete3d]

Sounds like adaptive lights are on, but no lc used.

I thought that initially, but there's no GI being used in the scene, and bumping up the light samples (even by a lot) seems to do nothing to affect the noise.

[yolov]

Thanks for the scene. It definitely doesn't look right, I'll make a note for the devs to look into this.

[Pete3d]

Thanks for the scene. It definitely doesn't look right, I'll make a note for the devs to look into this.

Thanks for that

[Pete3d]

Just to add for the devs: I noticed that if i use PROGRESSIVE rendering instead of BUCKET rendering the noise issue disappears. So its definitevly a bucket rendering method issue.

cheers,
PK

[yolov]

Thanks for sharing! I've added this as a note.

[ralenekov]

Disabling Phoenix FD Light Cache can be used as a workaround.