How to build a map from planes (walls, floors, ceilings)?

Hi, I have a question. ![How to build a map from planes (walls, floors, ceilings)?][1] I don’t need a pro-builder. I am a beginner and want to know if it is possible or necessary to build a map from planes or use the best options?

@UseDreams A really good tip is to just make it out of 3D cubes and put the material on those. It is way easier to do it with cubes then planes, as planes are supposed to only be used as ground. Good Luck!