I actually wanted to track TWO objects.
The first object (an HDRI camera left accidentally in the scene) needed to be tracked for removal. It is then occluded by the actor's finger poking partially into the first removal mask, so I needed a second track of the finger to modify the first removal so it doesn't get clipped. I wanted the finger to modify the object removal "mask" so that it wouldn't be removed.
I had all this working in the Mocha Pro OFX add-in. My end goal seems too sophisticated for Davinci tracking alone. But since I'm committed to move from Hitfilm Pro to Davinci Resolve Studio, I want to test all the capabilities going forward.
Next time I'll remember to grab the camera off the set!
If anyone is interested in what I;m doing, this is the scene with the camera still there:
This is the final VFX done Mocha Pro / Hitfilm:
Welcome any comments on issues i'm likely to encounter in Davinci Resolve 16.1.