This is the error message that I’m getting.
Invalid Selection. There are no non-vertical faces to stamp.
I went to geo location and downloaded the location on which I wanted to place a house. Then I imported a 3d outline of a house that I had created and hovered it above the location that I wanted to place the house. Next I clicked on the stamp tool and got the error message. If I select the object prior to starting the stamp tool, it doesn’t help.