真正的体积灯光雾，性能上优化的不错！

unity 体积灯光雾Volumetric Light Beam1.33
所支持的Unity版本：5.2.0 及以上版本
这是模拟聚光灯和手电筒的密度，深度和音量的完美，简单而便宜的方法。
The simple and efficient volumetric lighting solution compatible with every platforms (Windows PC, Mac OS X, iOS, Android, VR)!
The perfect, easy and cheap way to simulate density, depth and volume for your spotlights and flashlights, even on Mobile!
It greatly improves the lighting of your scenes by automatically and efficiently generating truly volumetric procedural beams of light to render high quality light shafts rays effects.