I have a bit trouble drawing cubes in 2point perspective. According to my book (“basic perspective drawing”), you can use the 45 degree vanishing point to establish the correct distance for a square or cube. However this 45VP can only be derived from the top view, which is pretty time consuming. Is there a trick to estimate the 45VP without having to draw the top view first? Or do you use other methods to draw cubes and squares?
Thanx in advance!