Stage 1: Turn this portrait into a clean 2D cartoon with simple ink outlines and flat colours. Keep the person's recognisable face shape, hairstyle, expression, pose and existing outfit. Keep the framing. Stage 2, starting from the accepted cartoon: Change only the visible upper-body clothing to a plain royal-blue zip-up hoodie, hood down, zip closed, no writing or logos. Keep the face, hair, pose, background and existing 2D cartoon style.
