How to create a quick rock Background in Photoshop. It's surprising how you can create stunning photorealistic rock and stone texture so easily.

Create a new RGB Image
of you desired size.
In the channels pallete click on new Channel. It will become alpha 1.
Press "D"
To reset the foreground and background colors. Filter>Render>Clouds
This is
what you will see in alpha 1. Still in the Channels palette, click on the
RGB thumbnail. Switch to the layers pallete.

Filter>Render>Lighting effects.
Set light to directional.
Select Alpha 1.
Click ok.
Instant
rock.
Go to Hue/Saturation
and add some color if you like. For more on Hue-Saturation see the tips page.