Gotta say this is yet another wonderful piece of digital painting! I think I'm learning things from you, but not really, but in my attempts to understand what you do, I'm teaching myself things unrelated to your style. So alls good. I do have to say however, that I have to add to the group that first thought it was a picture of a lone kangaroo. Which is a pretty cool illusion.
I'm not going to speak for him... but from what I've seen... it's all about getting randomness to spur ideas and directions that would otherwise have not presented themselves. Some of the textures and shapes stay towards the finishing steps, and others don't.
Leventep is using photography for his underpainting. He transforms, (warp, distort, copy..etc.) them for some basic shapes like in step 2, you can see silhouette of a girl. It speeds up a process, at least for him.