How to Create a New Brush in PaintTool SAIĪdding a new brush to your tool panel is the first step in creating a custom brush in PaintTool SAI. You can download custom brush packs made by other PaintTool SAI users online.Customize your brush using Brush Settings.Right-click any empty square in the Tool menu to create a new brush.Can you import Photoshop brushes in PaintTool SAI?.Does PaintTool SAI have custom brushes?.How to Customize a Brush in PaintTool SAI.How to Create a New Brush in PaintTool SAI.