Monte Carlo ray tracing
参考的主要论文和文档：
Monte Carlo Techniques for Direct Lighting Calculations.
Distribution Ray Tracing:Theory and Practice.
A BASIC GUIDE TO GLOBAL ILLUMINATION.
为什么好的技术总是那么复杂？
有办法将复杂的事情变简单?
200 rays per pixel
Monte Carlo Techniques for Direct Lighting Calculations.
Distribution Ray Tracing:Theory and Practice.
A BASIC GUIDE TO GLOBAL ILLUMINATION.
为什么好的技术总是那么复杂？
有办法将复杂的事情变简单?
200 rays per pixel
