In our challenge group Art Quilts Around the World the latest theme was 'Structure' and I knew immediately what I wanted to do.
Years ago I had a book by J. T. Unruh, Impossible Objects and I thought one of the illusions would make a good quilt. I photocopied a couple of pages and put them into my 'to do' file and there they have sat until now.
The design is called Pavilion of Cubes.