USING INSTANCE FOR LARGE SCALE VOLUMETRIC CLOUDS RENDERING IN REAL-TIME

作者：Wang Gang; Ji Zhenzhou; Zhang Zexu^*

来源：International Journal of Innovative Computing Information and Control, 2012, 8(6): 4407-4420.

• Volumetric rendering
• Real-time rendering
• Texture mapping
• Geometry model
• Lighting computation

In this paper we discuss instance as a novel approach to render large scale volumetric clouds in real-time. Firstly, a layered geometry model based on LOD (Level of Detail) was proposed. Instance technique was applied to the model, which effectively improves the performance of rendering volumetric cloud. Secondly, the 2D textures were used to modulate of cloud appearance, cloud shadow, city glow, which provides additional flexibility. Thirdly, the lighting such as multiple forward scattering was computed in advance. The results were stored in a 3D texture, which simplifies the lighting computation at runtime. Finally, the algorithm was implemented by means of CPU (graphics processing unit). The algorithm proposed is suitable for rendering the cloud covering part or all of the sky, which was applied to a helicopter flight simulator successfully.

• 出版日期2012-6
• 单位哈尔滨工业大学