Avatar or Photo Retouching (Part 1)

For my Module 5 project, I chose to design an avatar (Option 1). I really wanted to make something horror related, and slightly humorous. My avatar will be of me transformed into a bat. I am looking to supplement my ears, nose, pupils, and teeth to that of a bats', and manipulate the rest of my features.

Here is my sketch:

This is the picture of me that I will be using: