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Shower/tub glass transition
Bottom cabinets and trim at top
In particular, the bar opening could have a television mounted in it for now, and eventually be a little bar area, or an opening for artwork.
Use top for display cases?
Maybe not to the roof?? Art above?
Bench to add extra seating.
Love these stairs!
Bench along one side.
Similar to our counter
A couple large spaces for items other than books
Textured surface on back of shelves