Scumbling is a quick approach to adding texture to a flat surface and is usually applied to add interesting textures to your painting. Scumbling is also beneficial since it eliminates the necessity to spend a lot of time mixing paint colors together. You may use colors directly from the tube and still obtain decent results. Scumbling also allows you to loosen up your painting, making it look more spontaneous and loose, rather than having a rigidly defined form, line, and color.