EZ Lava Effect

Step 1

Create a new document of any size, I'm using a 300x300 document here.

Go to "Filter-> Render->Clouds"

Step 2

Go to "Filter-> Sketch->Chrome" and set all the setting of 10:

Step 3

Press Ctrl+Shift+L to apply Auto Levels Correction to your current document.

Next we'll add some color. Go ahead and press Ctrl + U on your keyboard to bring up the Hue/Saturation dialog

Apply the following settings.

Make sure you check the colorize box

Step 4

Press Ctrl + N on your keyboard to create a new layer and select black as your foreground color.

Next go to "Filter-> Render-> Clouds"

Step 5

Press Ctrl+Shift+L to apply Auto Levels Correction to your current document.

Next we'll add some color. Go ahead and press Ctrl + U on your keyboard to bring up the Hue/Saturation dialog

Apply the following settings.

Make sure you check the colorize box

And you have created a great looking lava background for use on your headers, and webpage backgrounds. Here is how my final result ended up: