Give simple rooms a ceiling not roof, add roof later
my reasoning is a room is just that a room and has room for a bed and not much else it has a ceiling and can be joined to another room whether horizontally or vertically. this way you can make a house.
Trevor_'s Rule of thumb when making arches
Discover the magic of the internet at Imgur, a community powered entertainment destination. Lift your spirits with funny jokes, trending memes, entertaining gifs, inspiring stories, viral videos, and so much more.