1.Ok first create a new document, i went for 350x150, and make sure it is set to transparent!

2.Filter>render>clouds

3.Filter>render>diference clouds

4. Press Ctrl+F as many times as you like, till you get something you like



5. press Ctrl+B

set the shadows to 80, 0, -80
set the midtones to 80, 0, -70
set the highlights to 60, 0, -70



6.we have finished that layer now, so create a new layer and put a linear gradient from one side to the other:



7. Filter>noise> add noise

amount 20
uniform
and check the monochromatic box

8. Filter render>blur>motion blur

angle 90
pixels 50



9.Blending options> Bevel and Emboss

Inner bevel
Chisel hard
depth- 1000%
size 1 or 2

everything else left as default

Blending options>Drop shadow
(leave as default)



10. Select the Elliptical Marquee tool and a cirles (by holding shift down) not too big though

11. press delete and you should be able to see the lava below, repeat stage 10 as many times as you like

Here is what i got....



if you have any questions please ask them ....

Let me see what you made......