Tricks For Using Masks in Reality Capture?

Is there some sort of trick for using masks in Reality Capture?
I have a Dice that I captured from two orientations (all 6 sides captured) I build both orientations with no issues. Then I exported Depth and Masks for each orientation, cropping out the side that was sitting on the ground. Now I want to combine the two orientations to make a complete Dice, however, even when I use the masks Reality Capture is still building the ground that the Dice is sitting on. This happens both for Alignment and Normal Detail Models.

Is there something I am missing?

Image and Masks

Alignment with masked images