Luminescent Lines

This tutorial will show you how to create an image similar to this:

Step 1

Start by creating a new document, here I used 1024×768px and 72dpi. Using the paint bucket tool (G) fill the background layer with black, alternatively you could use a dark gradient instead. Click the brush tool (B) then change the settings of this brush to a 1px round, white brush with 0% hardness. Create a new layer then select the pen tool (P) and in the main toolbar make sure paths is selected, now start slightly outwith the canvas on the left then using about four points draw a curve with a similar shape to the one below. Right click anywhere inside the document then select stroke path, make sure simulate pressure is checked then hit OK. Lastly hit the Esc key twice to get rid of the path.

Step 2

Now hold Ctrl and click on the layer with this curve in it, in the layers panel, this should make a selection around the line. Next go edit>define brush preset and save that curve as a brush. You can now hide this layer by clicking the eye next to it in the layers panel. Select the brush tool again then bring up the brush settings by going window>brushes. Choose the brush that you just made then use the same settings as below.