I'm not sure if anyone knows about this I'm sure you all do, but just incase. To make lightning first make clouds then add difference clouds until you get what you like then add about 4 sharpens, and walla, lightning that looks like some clouds kinda covering it up. Kinda a neat effect, but not very useful. :/ Enjoy.
if anyone need it i have a link to lighning brushes
>_> Why am I here then. :P
Dif i'll take em =)