We have these curved windows in our house that I am not sure how to dress.i do not care for the 80's fan blinds much, attempted a stained glass thing (failure), but really did not want it empty.
When I taught middle school art years ago, we did some really cool window art that let the light shine through the negative spaces of the designs..,
This was my design for classroom window, poster board with cut out designs.
(Above: circles in various sizes with patterns in between)
I had white acrylic paint and little bitty brushes. I love to doodle... So, I did it.