2. Open image in Photoshop and scale to U.S. Paper Size (8.5 by 11)
3. Go to Image> Adjustments>Posterize (about four levels).
4. Save image as a JPEG and open in Illustrator. Make a new layer and add colored shapes to add value to the face. You should have at least 3 levels on each part of the face.
5. Continue to add smaller details until image looks three dimensional and complete. Do not add a stroke on any of the objects.
6. Delete your original image layer from the background.