Japanese gardens also follow the principles of perspective of Japanese landscape painting, which feature a close-up plane, an intermediate plane, and a distant plane. The empty space between the different planes has a great importance, and is filled with water, moss, or sand. The garden designers used various optical tricks to give the garden the illusion of being larger than it really is, by borrowing of scenery ("shakkei"), employing distant views outside the garden, or using miniature trees and bushes to create the illusion that they are far away.