Learn how to make some lava to put on your background! Step-by-step instructions proceed...

1. Open up a new image, doesn't matter what size, preferably kind of large. Reset your colors (hit D) and go to Filter>Render>Clouds. Once you have done that, go to Filter>Distort>Wave and apply the settings below.

2. Now, go to Filter>Sketch>Chrome and apply the settings below.

3. We are almost done here. Go to Filter>Render>Lighting Effects. Apply the settings below. (For the two orange colors, use your judgement and pick colors closest to those colors. A little independence!)

You are now done! You should something like this liquidy lava that I have below.