OK I havn't ever written a tutorial before, so any comments would be greatly appreciated...
We're going from
to
First, take your image, (preferably black and white, this does work on some coloured images, but black and white shows the effect more) and crop and resize it to 100x100.
->
Then I used this brush by
heartthepretty and set it to overlay with an opacity of 30.
->
Next I rotated and slightly enlarged this brush by
filipinoz_rule and set it to screen with an opacity of 40.
->
And finally I copied the base, moved it to the top and set it to overlay with an opacity of 30.
->
Nice and easy. Let me know what you think, and show me any of your attempts =)