When you use the TV3D-Glow, things can get too bright very quickly. So, before actually drawing the glow to the screen, use TV3D's 2Dimmediate.DrawFilledBox to draw a BLACK transparent box on the whole screen. The color should be something like this: r=0,g=0,b=0,a=0.5. THEN you draw the glow to the screen.
Or you can just set the glow parameters to your likings.