人脸是我们最熟悉的器官，但真实感人脸合成却是计算机图形学领域中最困难的问题之一。

The human face is the most familiar organ to us, but it is a difficult problem in the area of computer graphics to synthesize realistic human face.

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阴影绘制算法的真实感和实时性之间的矛盾，是计算机图形学和虚拟现实技术目前所要解决的一个基本难题。

The contradiction between the realistic and real-time of the shadow rendering algorithm has been a fundamental and difficult problem in computer graphics and virtual reality technology.

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三维真实感地形的生成一直是计算机图形学领域中关注的焦点，而地形纹理映射是实现它的一个不可或缺的要素。

Texture mapping is an important element for the representation of three dimension terrain generation, which is a hot topic in the field of computer graphics.

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