Masking by black-and-white image


#1

Hi,

I’m trying to mask by some objects in the scene. This is my “objectID” pass

I used leave color and then some other cc effects and i got this:

So now I want to use this map as a mask.

So i put it under the layer I want to mask and then in my mask TrkMat I try any of the blending modes, but none of them does any effect.

What am I doing wrong?


#2

Put your Matte on top of the other layer and select “Luma Matte” as TrkMat

cya,
Jan