Original Tutorial posted by
Sben, corrected tutorial by me.
Most Important: Right, don't forget to change the canvas size to 1000 x 200 when you start. ;)
1. Set the colors to BLACK, Primary and WHITE, Secondary.
2. Add some noise with the default settings.
3. Polar Inversion offset -1.28 and -1.08,
amount 0.89. Change the Edge Behavior form "Wrap" to "Clamp".
4. Go to Image -> Rotate 180.
5. (Optional) If you don't like the final effect, go to Adjustments -> Hue / Saturation, and change the values until you find colors that you like.
Effect: