启动雾后，离视点较远的物体开始淡化成雾的颜色，同时，雾的浓度可以控制，即随着距离的增加物体变淡的速率可控，雾的颜色也可以任意设定。-Start fog, the distance of objects from the point of view began to play down the color into a fog at the same time, the concentration of fog can be controlled, that is, as the distance