[Exploding planets]

Lithium, try making the pebbles black & white then doing the tutorial, see which you preffer.

To do that just turn down the saturation completely before you invert the colour if that dont work do it the other way around.

or you could at the end change the RGB curvest so that it looked a bit like mine but putting the blue in the bottom right box and the green in the on to the left of it. may need some ajustment.

yep. I tried adjusting with the levels dude and yeah. Its much better. I turned down the hue and inverted the color. Got something like this.

I have to experiment on some other tweaks yet and other similar images^^ thanks a lot dude^^

[Exploding planets]

I tried using an image of pebbles on the beach. Here' what i got^^