I use 5 or 6 brushes but the basic coloring brush uses the air brush/hard brush to make the pressure contrast very strong. The brush size contrast is stronger, and the opacity is set to the default pen pressure. The large side is widely painted with an air brush, which is a basic air brush and has a small difference in pen pressure. To express details, make it an air brush with high pen pressure, and to complete and finish the shape, organize it with a hard brush with high pen pressure, and draw details. Often, I trim the shape with a sharp triangular brush, such as a crayon, which has a slight texture. This setting I use both Photoshop and ClipStudio, can be set up in both programs.