The technique is not to use lines showing the outer edges but use ink shading to form the shape of mountains and the branches and trunks of trees and then make several layers of spots on the shading.
輪郭線を用いず、山の大体の形や木の枝幹を墨のぼかしで作り、その上に墨の点を重ねてかきあげる方法である。