Guys you can make these dots using a Gaussian blur utility. Blue or Cyan as your starting base dot about 1\3 the final size. Then blur it progressively so you have a solid white tiny center gradually ring graduating out with blue\cyan to nothing. When you look at it through your gunsight at 12:00noon it looks like the dot o death. Depending on the background you will gain a blue ring haze. Then as the daylight drops off morning or evening you get a bluish ring dot that stands out. Or green as I've included below. I had to add a green yellow micro ring to the green dot's center to create a contrast. Green doesn't act like red or blue in the gunsight mask.
Darker colors through the gunsight will begin to disappear or look like a haze. Lighter colors become solid in the gunsight mask or glass reflector plate area. That's why when you look at the blue dot below in the game it looks white graduating off to nothing until there is a con in front of it or aiming at the ground.
I updated the DotS with a blue and green.: http://www7.zippyshare.com/v/76475905/file.htmlEach bmp file needs it's mil file copied to the sight folder.
Blue Dot
Green Dot