这个代码是实现雾气多重效果的代码，可以设置雾气浓度，颜色，及阳光在雾气中的光照特性。对中高级的效果开发，很有参考意义，一定可以运行。-This code is the code to achieve multi-effects fog, mist concentrations can set the color, light and sun in the mist of properties. The effect on senior development is very useful, it