Yeah, making the mask black and then inverting to constrain. But its pretty limited. I usually end up using two tracers- one for the shapes and one for the region of interest shapes and then multiply those together.
I’m almost positive there is a custom hot key you can make for this. I’ll have to check mine tomorrow.
I have a custom key for it: Smoke C. I hardly ever use it. I just re-poke vertice 1 to close.
In GMask Tracer, you should be able to get what you are looking for if you do the following if your setup only has one GMask: Set the Matte Correlation to Inside.
You could also leave as is, create a second Matte output and set that Output to Blending - Override and Composition - Inside.
Dealing with the Blending, Matte Composition, and Correlation is wayyyyy too complicated. We could look into this, but it’s the compatibility with older setups that may be very hard to deal with.
Oh I know! But sometimes I’ll just be making a couple masks and then realizing ROI doesn’t work like old school, so have to copy paste some nodes and do some comp node maths.