well tbh i don't think you can add 'light' into the game without shaders..right? because the joints are all colored the same except for a little gleam in one spot. It isn't any darker on the opposite of that side..
But with shaders you can add light...adding to that you can come to the conclusion that you can subtract light, and by subtracting light, there is also no darkness... just void.
lolpun