法向量貼圖運算方式提供了進階的材質貼圖能力，它可以在Low-Poly的模型下，利用法向量貼圖來增加該物件的精細度。由於法向量貼圖所表現出來的效果十分逼真，加上電腦硬體的進步，繪圖處理晶片可程式化的特性，使得在即時繪圖領域上可以享受接近非即時繪圖領域的效果，也因此法向量貼圖的技術也開始運用在電影動畫的人物表現，取代了原本精細的模型。

本篇論文研究是透過文獻探討的方式了解貼圖的原理及種類，進而深入探討法向量貼圖的技術發展及實際應用。

最後透過實作，利用法向量貼圖代替大量的多邊形來表現模型的細節，將Low-Poly的模型經由法向量貼圖的技術刻畫出人臉部的凹凸立體感。

Normal mapping is a technique used for bump mapping in 3D computer graphic. It can be used to add details of a low poly without using more polygons.
By the new programmable 3D GPU technology, we can achieve the rendering quality like films. It still need some skillful algorithms if both quality and efficiency are chief considerations, the application of the normal mapping is the most important approach.

This research is used to understand the principle and type of texture mapping by literature review, and then know it how to use the technique of normal mapping.

Finally, this demonstration tries using various kinds of normal map creation tools to make people’s face mapping, and use normal mapping to depict the wrinkles and details of face by low-poly.

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