采用Phone光照模型并通过引入外部光源来凸显生成图像的真实感，给出了一种预先为体数据场计算法线并编码，根据编码后的法线和Phone光照模型生成三类明暗光照表的加速算法，-Phone illumination model adopted by the introduction of an external light source to highlight generate realistic images, gives a pre-calculated data field normal to