I’m writing this one as I found no help online to achieve this – I wanted to paint a rainbow in Scarlett’s room that started on one wall, travelled over her door onto the ceiling, came down an eaved part of the ceiling, and then came down the adjacent wall.
I get these ideas in my head sometimes that I can’t get out. Things that aren’t actually that practical or even feasible, but I want to do them anyway because I think they’ll be amazing if they work. SPOILER ALERT: this worked. It’s in the header image right there.