Depth-Of-Field bucket problem on single machine

[OPKJoe]

Hello everybody,

I am having the following problem.
I want to aniamte a close up of dust floating in the air. But when rendering with Depth of field (3ds max Physical Cam), certain buckets just don't render - and that on a single machine. DR is completely turned off.

What I did:
- Filled a volume with little spheres and gave them a slow random movement
- Animated a camera inside the dust moving slightly away from it
- activated Depth of field
- on top of that I want it to be an effect in a stereoscopic animation so I added a stereoscopic helper to the scene, but even when I turn that off, the problem occurs. So I guess that's not the cause.


My Specs:
- 3ds Max 2017
- V-Ray Build 3.50.04 (official) (03 March 2017)

Attached images of the rendered result, the PFlow-Stack and the camera.
If necessary also attached the max-file.

I really really hope you can help me!

[kosso_olli]

Increase Min AA value and possibly make the bucket size larger.

[OPKJoe]

Increasing the Min AA did indeed solve the problem.
Don't know why I did not try that but thank you very very much though !!