For complete realism, what you actually want is a full volume render of your surface.

完全写实，其实你想要的是一个完整的表面体积使你。

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The volume rendering method does shading processes to all of the volume data directly, maintains the details of the medical images, and achieves better render results.

其中的体绘制方法直接对所有的体数据进行处理，有利于保留三维医学图像的细节信息，具有较好的绘制效果。

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Direct volume rendering based 3d texture can guarantee image quality and reach interactive frame rates. Because of the restriction of texture memory, it is difficult to render large volume data.

基于3d纹理的直接体绘制算法可以在保证图像质量的同时达到较好的交互性能，但由于纹理内存的限制，大规模数据场的3d纹理直接体绘制比较困难。

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