Describe landscapes with the wind, and the water, and the setting and rising of the sun.
THE WIND.
All the leaves which hung towards the earth by the bending of the shoots with their branches, are turned up side down by the gusts of wind, and here their perspective is reversed; for, if the tree is between you and the quarter of the wind, the leaves which are towards you remain in their natural aspect, while those on the opposite side which ought to have their points in a contrary direction have, by being turned over, their points turned towards you.
Taken from The Notebooks of Leonardo da Vinci edited by Jean Paul Richter, 1880.