The tool can be used in various digital painting software as well as Substance 3D applications.
3D Artist and Illustrator Rakurri has recently released a convenient new tool designed to greatly improve your texturing and digital painting workflows in apps such as Krita, Photoshop, and Substance 3D software. Meet Rakurri Brush Tip Generator, a neat tool that can procedurally generate custom brush shapes, which can then be exported as .png files and used in other programs.
According to the creator, the generator provides several easy-to-use sliders, such as Shape, Warp, Distort, and Blur, which you can tweak to your heart's content in order to create any brush tip shape you want. At the moment, the tool is available as a Substance 3D .sbsar file, with the developer planning to release a Blender version in the near future.