基于三层材质模型，设计了实时交互式渲染平台，利用基于物理的双向反射皮肤分布函数，模拟了光线在皮肤表面的反射.采用高斯模糊线性之和与纹理坐标扭曲纠正，有效地模拟了光线的次表面散射效果.结合表面反射和次表面散射，得到了最终的面部真实感实时渲染.该平台具有友好的交互式界面，在光线旋转时，可以查看反射和散射的效果，实现实时添加高动态范围背景、调节光照强度或者模糊程度等基本交互操作，更好地辅助用户对虚拟人进行控制和设计.

An interactive rendering platform is designed based on three-layer material model. The specular reflection of human skin is approximated based on the bidirectional reflectance distribution function, and the subsurface scattering is effectively simulated using sum-of-Gaussians blur and texture coordinates stretch correction. Combining specular reflection with subsurface scattering, the final real-time rendering for realistic face is obtained. The interactive platform provides a friendly interface for user to operate digital character, views the reflection and scattering effect when the incoming light is rotating, adds high-dynamic range environment map in real-time, and adjusts intensity of illumination and degree of blur, which greatly help user to control and design digital character.