一个Flare的实现，光耀效果应用很多，如太阳光晕，烛光，闪光灯等等。其原理都类似，关键是材质和模型的选取。-The realization of a Flare, Guangyao effect of the application of many, such as solar flare, candle light, flash and so on. Its principles are similar, the key is the selection of materials and m