Gone are the days of pixelated mustaches and 256-color palettes. The videogame industry today is all grown up and finally armed both technically and artistically to compete with Hollywood. James Cameron relied upon Digital Domain, a special effects company that employs more than 500 people, to create the emotive aliens and lush scenery in his $500 million science-fiction blockbuster Avatar. Game makers, with access to budgets that increasingly top $15-20 million, turn to teams of artists and programmers every bit as gifted, as evidenced by the startlingly realistic results they sometimes achieve.