Ascors arts

[Zanshin]

You could make it better in some easy steps.

First blur the dark lines between the head, legs and body.
Then blur the outline and add some more shading.
And in this example i used the "Artistic Blur"-effect from Photofiltre Studio, then in changend the color, shape and contrast a bit and the outcome was this:
http://img1.abload.de/img/frogt7nx.png
or
http://img3.abload.de/img/frogke8s.png

Just work a bit on your frog, you can do it better.