I’d say go for one wall unless the room is huge. I used a mural from https://costacover.com/collections/wall-mural behind my sofa and left all other walls neutral. Result: the wall became the focal point, not the entire room. If you cover all walls you risk overwhelming the space unless the mural is subtle. This way you get statement design and the rest of the room stays calm.
I’d say go for one wall unless the room is huge. I used a mural from https://costacover.com/collections/wall-mural behind my sofa and left all other walls neutral. Result: the wall became the focal point, not the entire room. If you cover all walls you risk overwhelming the space unless the mural is subtle. This way you get statement design and the rest of the room stays calm.