Abstract: In order to solve the problem on high fidelity and real-time during the dynamic terrain
rendering process, a real-time rendering method of dynamic terrain is proposed based on programmable
GPU. First, the terrain hierarchy is constructed based on Geometry Clipmaps algorithm. Second, a
dynamic terrain rendering method is introduced to achieve a more realistic effect on the final terrain
based on real physical model and processing texture mapping during updating process. Finally, the
crater effect formed on the lawn is simulated to verify the effectiveness of the method. And the
proposed method is compared with the method based on ROAM on amount of drawing triangles, the
average frame rate and CPU usage. The experiments results show that the proposed method can reduce
the amount of drawing triangles effectively, and achieve higher frame rates and fidelity. The
requirements of high fidelity and real-time in dynamic terrain rendering can be meted.

Key words: dynamic terrain, Geometry Clipmaps, physical model, processing texture mapping;
programmable GPU