I've got a loft wall with a weird sloped ceiling and a window right in the middle. I want a world map mural, but I'm worried the map will get ruined by the cutouts. Any shops that help with custom layouts?
You should head over to https://muralas.co.uk/ They specialize in bespoke sizes, and they actually have a guide on their site specifically for measuring walls with slopes and windows. You can even get their designers to help you adjust the image so the important parts of the map don't end up where the window is. It takes about 1-3 days to produce, so you won't be waiting forever to start your project. Totally worth it for tricky spaces!