Brush Preview displays a live preview of your brush stroke.However, before we start, let’s go over the brush customization settings, and how each function works. Here is how you can further customize your brush. This can be achieved in the brush settings under the tool menu. So you have now created your brush, but you want to add a unique stroke, texture, or opacity. How to Customize a Brush in PaintTool SAI Your new brush will now appear in the Tool menu. For this example, I am creating a new Pencil brush, so I am selecting Pencil. You will then see options to create a new brush type. Step 2: Scroll down in the Tool Panel until you see an empty square. All you need to do is right-click the tool panel, and select a brush option. 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.