I love painted stenciled ceilings (as did William Morris). Here are some with a real arts and craft vibe. If I was going to do something like this in my house (or palace), I'd paint masonite panels then screw them up with drywall screws and my trusty Makita and put trim over seams.
And finally, three last pics from Kyoto trip of things I thought were really beautiful....
rock alter and bowl
rock bridges in rock garden