I am enchanted to find that what I am learning about one point perspective works very well in the service of loose and slightly chaotic drawing, thus:
For this sketch of our hall, I carefully worked out the angles — the vanishing point is in the mirror down at the end of the hall — but then drew quickly, over the pencil lines, and was loose with the watercolor. So it’s got a quirky look. But the lines are true. Much fun.