This is something I want to do also, but haven't spent the time to figure out the angles. Great job on yours. Any advice you want to share would be deeply appreciated.
I love your Bay Window! It looks great , 3 dimensional. Attic window quilts are always nice but this one really has that extra punch taking it over the top.
Love it! First time I've seen a bay window attic quilt. It's really eye-catching and the view "outside" is very inviting. Love your wood ceiling, too, by the way.