Have you ever seen those sports posters with athletes flying in the air trying to get or shoot a ball? Well, some of them have a nice glowing effect that seems to be coming from a light bulb behind the figure. Lets say that you are standing at the mouth of a very long tunnel. Because of the laws of perspective, the tunnel seems to be getting smaller and smaller at the end, until it reaches the vanishing point where you can only see a dot. If the light bulb was that vanishing point and the walls of the tunnel were the glow, the athlete (or whatever you want) would sit on the vanishing point, giving it an effect that the glow is reaching outward and coming to you as if a huge explosion caused the glow. I think that you might have realized what I mean, and I know that it is hard to explain it. So the answer is worth a lot of points!