Аннотация
The paper presents a model of light passing through translucent materials. The model allows you to effectively model effects that models of the bi-beam reflectivity function cannot provide, such as color propagation within materials and light diffusion across shadow boundaries. The method is effective for anisotropic, highly scattering material that is difficult to simulate using existing approaches. The proposed model combines an exact solution for single light scattering with a point source of approximate diffusion for multiple scattering. An image-based method for determining the optical properties of light-transparent materials is described. The method of data sampling using the ray-tracing method is considered. A method for displaying mirror and glossy surfaces is proposed. The use of aspect measurements for displaying metallic and mother-of-pearl colors of surfaces is considered. The implementation of an intuitive choice of model reflection parameters and a method of appearance refinement independent of the reflection model is proposed. An important aspect of the method is the ability to quickly display homogeneous and pseudo-homogeneous objects, for which it is not necessary to completely scan the volume, reaching the last level of recursion, but it is necessary to ‘skip’ homogeneous areas along the Z coordinate, and immediately calculate the color and overall transparency.