Cut out the frog using the selection tool. And place on top of the bg.
step 4 of 6
Brush some stuff to get an idea of what its going to look like.
step 5 of 6
Here I used some of my holiday pictures of rocks and grass. I used the stamp tool to copy some rocks and grass where I should think they should be.
step 6 of 6
This is the hardest part, I used all sorts of brushes and filters. But mainly I used a scatter brush for the leaves, a multiply brush for the shadows, and a dodge brush for the highlights.