The Real Ninja Turtle, Err Tortoise.

This image is a result of a one day play with an asset I released earlier today.
The model was built from ground up in Zbrush. All the details are hand sculpted and hand painted, meaning, I did not use any third party alphas or brushes or any photoscanned or photographed textures.
Rendered in 3ds max with Corona.
For the rock and cloth I used couple textures and a rock object from Quixel Megascans library.

Here's another version; https://www.artstation.com/artwork/oOeayz