What methods are commonly used in landscape painting to draw clouds and what are the main methods to draw water?

It is the business orientation of each painting. In the whole picture, there must be light and heavy, and it should not be dull. If it is leveled, there will be no potential and no one can catch it. In landscape painting, trees and stones are generally solid, while clouds and water are empty. Nature skillfully arranged clouds and water for painters, making it easy for painters to achieve real and serious effects. Of course, you don't have to draw clouds and water when you are empty. Without clouds and water, we can achieve the goal of emptiness. But generally speaking, it is the freest and most convenient to draw clouds and water in an imaginary place, because no matter how high or low, there are traces of clouds on the mountainside and even at the foot of the mountain, and drawing clouds will never violate the painting principle. On flat land, water can also be everywhere, such as rivers and lakes.