Alvin Portrait 2

A colored version of one of my drawings from my Alvin Practice Sketches. This is the picture on the bottom-left. [link] I don't know why, but I decided not to color Alvin's stripes. I used Photoshop for the lineart, PaintTool Sai for the color, shadows, and highlights, and Photoshop again for the background.

EDIT: Finally finished the touch ups. Added shadows and highlights, plus a background. I need to work on shadows. If anyone has any tips, let me know.