Today the back wall of the dining room was removed (and the sliding glass door turned 90 degrees so it will exit onto a deck). This joins the addition to the original house.
The photos 1 and 2 are from the dining room looking back toward the master bedroom, and the third is the reverse of those. The fourth photo is looking into the laundry/mudroom.
Of course, it is still under construction, since the floors, the windows, and the ceilings are not done, and there is more insulation to go into the ceilings. But it looks and feels so much more like a "whole house" now instead of just sections of one.