And here is what brush I have used.

digital paintings



digital paintings



digital paintings



digital paintings

Result. Not the best but it's surely gives some texture and edge carving.

digital paintings
  


We have almost forgot the background. So create a layer and in the middle. Now you see what I mean about all these layers.

digital paintings

Switch to the layer 1 (top) and apply the polar cord lines filter.

digital paintings

And here is our good result.

digital paintings