This tutorial was written by the then owner of legittutorials.com . I bought the site and tutorials from him and have moved it to designertuts.com
In this tutorial you will learn how to create a sweet techno style background.
Step 1: Clouds
Open up a new document, your desired size, and render clouds (filter>render>clouds).
Step 2: Pixelate
Pixelate the clouds (filter>pixelate>mosaic), set the cell size to 17 and press ok.
Sharpen the layer twice (filter>sharpen>sharpen).
Step 3: Halftone
Duplicate the layer (ctrl+j). Apply halftone pattern (filter>sketch>halftone pattern) to the duplicate layer with the following settings.
Set the layer to overlay and lower the opacity to 10%. Merge the 2 layers.
Step 4: Extrude
Make a duplicate of your layer, and apply extrude. To extrude the layer go to "filter>stylize>extrude". Use the default extrude settings (type: blocks, size: 30 pixels, depth: random).
Set the layer mode overlay (on the layers pallet), and lower the opacity to 70%.
Step 5: Color
Create a new layer. Set your foreground, and background, colors to two different, vibrant colors. I used #8fde05 and #05deb3. Create a diagonal gradient.
Set the layer mode to overlay.
Step 6: Border
Create a new layer. Now grab a 200 pixel black soft brush, and brush all along the edges.
Apply gaussian blur (filter>blur>gaussian blur). Set the amount to 30.
Step 7: text
Add some text to your wallpaper. Thats it, you're done!