摘要
针对具有非均匀特性的半透明高光玉石真实感渲染问题,提出一种利用高光层、散射层光照模型叠加的模拟方法。该方法结合散射剖面实现非均匀玉石多重散射的效果,同时利用预计算的本地厚度贴图结合高斯模糊,实现基于表面厚度的光透射表现,并通过与基于微平面的高光反射项在能量守恒的基础上叠加,达到模拟真实感的效果。实验结果表明,该方法能实现不同种类非均匀玉石的真实感渲染,并保证了模型片面数较多情况下的实时效率。
Aiming at the problem that realistic render of the translucent jade model,a superposition light mode is proposed by combining high light with diffuse light.Based on diffuse profile,the method is used to simulate multiple scattering for inhomogeneous jade.Meanwhile,light transmission effect based on the surface thickness is realized by combining pre-computed local thickness maps with Gaussian blur.And specular reflection items based on micro-plane are superimposed on the basis of energy conservation,so as to simulate a realistic material performance.Experimental results show that the proposed method can achieve photorealistic rendering of different kinds of inhomogeneous jade,and ensure the real-time efficiency under more triangular patches.
出处
《桂林电子科技大学学报》
2016年第4期321-328,共8页
Journal of Guilin University of Electronic Technology
基金
广西科学研究与技术开发计划(桂科攻1598010-7)
广西高校图像图形智能处理重点实验室基金(LD15043X)
桂林电子科技大学研究生教育创新计划(GDYCSZ201418)
关键词
非均匀材质
多重散射
散射剖面
光照模型
inhomogeneous material
multiple scattering
diffuse profile
illumination model
