essentially, the whole inner wall and part of the outer wall gets cut
out of the piece, and a new inner wall piece (probably printed in a
different color, or with some design of its own) created that can be
seen through the outer wall's window
multiple window and inner options are possible, this is just the start
while I do other organization
Signed-off-by: Brian S. Stephan <bss@incorporeal.org>
