Looks like the alpha blending for the foreground haze effect. On med the filter used is a lot more coarse, so glow effects stand out more. And on low its disabled. I tired it with a different color bomb head, but didn't notice it stand out as much as yours does.... could be the way your video card handles it.
Looks like the alpha blending for the foreground haze effect. On med the filter used is a lot more coarse, so glow effects stand out more. And on low its disabled. I tired it with a different color bomb head, but didn't notice it stand out as much as yours does.... could be the way your video card handles it.