Updated : 2021
How to create and convert Photoshop custom shapes into brushes tutorial.
Custom shapes can be used as a powerful source for all kinds of brush strokes in Photoshop. You can apply the shape as a single custom shape and then define that as a new brush via the edit menu and define brush command.
You can also use effects along with the custom shapes to create even more unique brush strokes. You can also create Photoshop brushes using multiple Photoshop custom shapes (and these can be applied in countless ways to create countless possible brush designs). The shapes can also be useful as pattern presets. This tutorial shows you how to create brushes from Photoshop custom shapes.
Select CSH tool in the toolbar
Set to layer or fill pixel option (top bar)
Apply shape (or re-apply shape and create more shape decorative graphics)
Use visual effects or change blending mode or change shape and re-apply as required
Edit menu
Define brush
Saved to preset panel
Select a stroke tool as required and paint
Create a new document, select the CSH tool and set to pixel fill or layer and then apply the preset with the required size, color etc. Re-apply to build up an interesting stroke design. Use the edit menu define command to create a new brush from the generated artwork. Select one of the paint tools in the toolbar and then Paint.
If you want a direct translation of the shape to a brush, the best option is to use the shape layer and apply a single shape in black (filling the entire document). Flatten the image and then use the define command found in the edit menu. You can, as the presets are vectors, apply them to any size of document (say 2500 x 2500 and then define that. Sadly there is no tool that can migrate a preset from one type to another.
Select custom shape tool in Photoshop toolbar
Select color (preferably black)
apply shape across the entire document
edit menu
define brush
You don't have to use a single shape.
select the custom shapes tool
select the color via the foreground color
select the shape in the shapes panel
apply a small shape
change color
apply another small custom shape
repeat
edit menu
define brush
You can also apply a shape with layer effects or use visual effects such as blur and then define that as a stroke via the edit menu "define brush" command. You can also set up an action to repeat this action with any preset. It is a quick and easy way to create endless tools with the presets as a great source. The image combines multiple blurs along with the wonderful oil paint filter
Select the custom shape tool in toolbar
Set to pixel option
Set color
Select shape
Apply the design once or multiple times
Go to the filter menu
Select the blur filters
Apply filters once or multiple times
Edit menu
Define brush command
You can use the presets as a source for patterns and then use the patterns as the source for the strokes instead of the vector. You can also use the shape in the 3D menu with the new extrusion from layer command.
You can see the same "C" letter shape artwork used as a 3D model and then used as a source for a new stroke and added in orange
Select custom shape tool
set color
select the custom shape
set the option to shape layer
apply shape (as layer)
3D menu
new extrusion from layer command
render 3D
flatten
edit menu
define brush