The　simulation　of　large　crowds　of　characters　is　important　in　many　fields　of　virtual　reality,　as　they　can　increase　the　credibility　of　the　virtual　environments.　Rendering　large　crowd　of　characters　requires　a　great　mount　of　computational　power.　To　increase　the　efficiency　for　this　render,　we　propose　a　GPU-based　crowd　rendering　method.　We　present　a　novel　hybrid　rendering　method　using　geometric　representation　for　characters　with　more　detail　and　dynamic　impostors　for　characters　with　low　detail.　We　also　present　a　new　framework　to　perform　interaction　task　on　GPU.　The　results　validate　that　the　presented　method　can　get　interactive　frame　rate　while　rendering　large　crowd　of　characters.　©　2008　IEEE.