Noise in Multimatte Render Element

[kosso_olli]

Hey guys,
I came across a new problem that is happening in absolutely every scene lately. In the Multimatte render elements, we get green/red/blue colored noise in black areas. Attached you can find two screenshots illustrating the problem. The crop shows an area of the multimatte where there should be no information at all. The first image has the exposure rised up to show the effect better. The rendersettings are default, except Max AA which is 48, noise threshold is 0.005. Standard settings we use for all our renderings. Do you have an idea, where this is coming from?

Max 2017
V-Ray 3.60.04

Regards

Oliver

[kosso_olli]

Also happens in Alpha I just found out. Any clues?

[svetlozar.draganov]

We can't replicate that into our environment - would it be possible to attach sample scene?
Can you also try to replicate it on a very simple scene with a basic primitive and a light?

Looking forward to hearing from you.