Room decorating ideas for white walls

It’s a known fact that white walls can only induce an impression of a bigger space, right? Or at least, white walls will create an optical illusion meant to make you think a room is bigger than it really is. So, decorating such a room isn’t as easy as expected. Of course, you could decorate it the way you want, but if there are too many objects, the effect given by the white walls will simply disappear.