Tall buildings - 3 vanishing points

Today the exercise was to draw 2 tall buildings. The one on the left represents looking down on the building, while the one on the right, represents looking up at it.

Two of the vanishing points consist of the side of the buildings, and the other vanishing points consists of the top or the bottom. Looking down on the building the top looks larger then vanishes, while looking up, the base looks much larger.

I think I did a better job on the left building and the one on the right turned out to be too wide. Will have to note that for next time.