short guide on how to make lightning.
Step 1: Open Up the File
now we open up a new file with no background.
Step 2: Cloud Time
now we go to filter>render>clouds. make sure you color is blue then white.
Step 3: Change the Clouds!
now go to filter>render>difference clouds.
Step 4: Invert
now click crtl+I. or invert for some people.
Step 5: Levels
go to image>adjustments>levels. then slide the bar all the way to the right.
Step 6: Finish Prouduct
then you get this.