Define a brush.
create a black and white image with a transparence.
![](http://modunreal.com/wp-content/uploads/2023/02/01-2-1024x788.png)
![](http://modunreal.com/wp-content/uploads/2023/02/02-2.png)
Then you need to define your brush by clicking on the menu Edit > define brush
![](http://modunreal.com/wp-content/uploads/2023/02/03-1.png)
If you can’t find it select the window menu than brushes.
![](http://modunreal.com/wp-content/uploads/2023/02/04-1.png)
![](http://modunreal.com/wp-content/uploads/2023/02/05-1.png)
![](http://modunreal.com/wp-content/uploads/2023/02/06-1.png)
create a black and white image with a transparence.
Then you need to define your brush by clicking on the menu Edit > define brush
If you can’t find it select the window menu than brushes.