常量
NGraphics|FLAT_MAP_COLOR_DETAIL_MID_POINT
the color detail mask (blue channel in flatmap_detail.dds) subtracts from the color value when below the mid point and adds when above
定义loading_screen/common/defines/graphic/00_graphics.txt:111
0.5
the color detail mask (blue channel in flatmap_detail.dds) subtracts from the color value when below the mid point and adds when above