与视点相关的三维作战地形实时渲染技术一直是作战仿真领域的热点问题之一。

The technique of three-dimensional battle terrain's real-time rendering, which has relation with viewpoint, has long been one of the hotspots in the battle-simulating area.

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当照相机显著地移动时，引擎也只不过重新渲染下视点替用特效，并且，你可以很好的去获得其它的帧。

When the camera does move significantly, the engine simply re-renders the impostor, and you're good to go for another couple of frames.

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既然你已为使用视点替用特效纹理做了必要的准备，在你3d对象的位置渲染一个对齐视窗的精灵应是件很简单的事。

Now that you have the impostor texture ready for use, rendering it is simply a matter of placing a viewport-aligned Sprite where your 3d object used to be.

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