This quick and easy step by step shows you how to find the center of a square or rectangle in perspective. Once you've learned this simple trick, you can use it to evenly space building features like tiles, bricks and windows, or position a door or roof.
First of all, draw your square or rectangle in perspective. This might represent a floor, or wall, the side of a building or box. This method works for both one-point and two-point perspective.
Then, draw two lines joining the corners of the box diagonally as shown. Where they cross is the center of your rectangle.