Here is a tip for making interior/exterior floors, walls and whatnot.
Find or design a pattern that you like and to the size that you need on whatever computer program that you use. Then print your creation on 8.5" X 11" Shipping Labels. Cut out your design, peel off the backing paper and stick where it needs to be stuck.
In the photo below you will see that I used a pattern for the floor and designed the walls. I also made the inside window trim that serves a second purpose to holding in the glazing.
There are many uses for this method of interior/exterior design. Let your imagination be your guide.
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