Using photos and freehand (I've used a Wacom tablet) I've made the textures in Photoshop each 2048x2048. I've applied the texture to the frog but I've noticed (I was expecting that :P) that some of the textures seams needed to be adjusted. I've used the built-in maya 3d paint for that, using the clone tool.

When the color texture was made I've created the specular, bump and diffuse map from that.

Now was the time for setting up the scene. I've created a simple plane where I placed the frog and I've rotated it about 17° (I've done that for the frog too). For the plane texture I've used a photo made by me, I've cropped it about 1300x900, I've than made the bump.

I've created a camera and I've enabled the depth of field on it. As you can see from the grab I've made a distance tool placing one locator in the point of focus on the model and the other locator in the camera lens. I've than parented that locator to the camera so that when I was moving the camera also the dimension value was changing.