The key technologies such as mapping technology, LOD technology and DOF technology were analyzed.
在关键技术中，主要探讨了建模的纹理映射技术、LOD技术以及DOF技术。
The LOD technology is used, and selecting the tree models of different complexities according to different distances improves the speed of rendering.
在绘制时根据不同距离选择不同复杂度的树木模型，加快了渲染的速度。
In this article, we also improved the rendering efficiency of the cloud by using the LOD technology, stoppage ahead technology, the space segmentation technology and etc.
该文还运用LOD技术、提前中断技术以及空间分割技术有效地提高了云的绘制效率。
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