Holdout matte

Hi, the holdout matte doesn’t seem to work?

I made a roto that goes into zMatte (Holdout Matte)
But when I change the amount, the whole image changes.?
And not the area of the roto.


The Holdout Matte input in zMatte is working as expected. Can you send a project with 1 image so I can take a look?

If the source clip you connected to the Roto node has opaque alpha, the entire frame will be affected in the Holdout Matte and the roto shape will have no effect in that case.

To remove the source alpha, select the source in the Trees window and set the Node > Alpha > Fill pop-up menu to Transparent.

like a dream come true!