| Hi-index | 0.00 |
Real-time and realistic rendering of forest is an impor- tant and a difficult work in computer graphics and digi- tal forestry. An image based real-time and realistic forest rendering software is developed in this paper. Three or- thogonal billboards are used to represent the geometry and material of a tree, so that the 3D perception is enhanced and weak parallax of usual images based approaches is avoided. Shadows of all trees on the plat ground are gen- erated through the stencil buffer, shadow projection and a mixture of the shadow with grass texture. Different bill- boards are chosen on the viewing direction and the lighting direction, so that the effect of object torsion due to poor im- age direction is avoided. Forest growth, forest rendering in different lighting conditions, navigation inside a forest, and flying over a forest are all simulated.