Davinci Fusion Planar tracking, effect mask distorted size

Question

I'm having problems trying to apply a polygon mask to a planar tracking media which is UHD. My project is HD and my background image (the building) is also UHD. My tracking window and mask look like this:

Then when I attach the polygon mask it gets scaled like this:

How can I resize the media or the mask so it fits my background?

Answer 1

I figured it out. You have to apply the mask and background with a merge node after the original composite using the tracking data like this: