How about a landscape painting hanging on the bed background wall in Feng Shui?

All right, whatever picture is hanging on the bedside. The question you mentioned has nothing to do with geomantic omen, and you can't even get close. As for what pictures to hang, it doesn't matter, mainly because you like them. In fact, there are not many things related to Feng Shui in real life. Not everything is related to feng shui. Don't associate everything with feng shui.