Emilie Brown's pre-vis portfolio contains work in character design, environment design, sketches, life drawing, and paintings. Some highlights include character designs based on foods like a runner bean and cheeseburger, redesigns of book characters like the BFG, sketches for an environment project set in a swamp, and digital and watercolor paintings of characters and landscapes. The portfolio demonstrates skills in animation-style character design, environment design, figure drawing, and painting in various mediums.