Masking objects emits light

[Tok Tok]

Hello,

I'm masking an object out for color adjustments later (animation) and I'm using FstormMultimatt to do this. But the result is that the mask is emitting light:

How can I mask objects without them emitting light to the rest of the scene? Or what is causing this so I can prevent it?

Thanks

-J

[Karba]

Try to switch off reflections in FStormMultiMatte render element.

[Tok Tok]

That worked, thanks! Should've checked before I posted, it was really simple