I’ll show you how this PNG image was created in Blender.
When you open Blender, and there should be a cube like this.
Press [Numpad 7] to go to the top viewport.
[Tab] to go to Edit Mode, [3] to face select. Select the bottom face, and type [S] to scale like this.
Type [G] to move the selected face upward like so.
[Tab] to go to Object Mode, and press [Control + A] to Reset All Transforms.
Press [Shift + A] and create a new empty object.
Select the cube, and add an array modifier.
Select Object Offset, and select the empty object.
Select the empty object and go to its properties. Change the Z rotation to -25 degrees.
Select the cube, and increase the array modifier’s count to 14.
Press [Shift + Alt + Numpad Zero] to set the render region.
Press [F12] to render, and save the image as PNG.
Open the image in Photoshop. [Control + Click] the image layer to select the image.
Go to [Edit -> Define Brush Preset].
This is the end of the tutorial. 🙂