This wish should be easier than the morphing wall wish. I played egoboo (3d opensource game for linux) and saw a nice idea: an ennemy who is a black light in fact.
But I dont like fighting in a full black so I think the effect should be improved. And the following description is the how I see it:
a black light would be a kind of light eater. It\'s not an ennemy just a special light for an atmosphere purpose. It would add an unatural atmosphere: some place would be terribly dark (exactly like a black hole... but without the gravity 8o ).
It could be easy to do if you just need to reverse the light effect...
Off course the normal light effect must be terminated before trying to work on this wish.
PS: I post here because I know ps and because I dunno if the ps team could do that without adding anything in cs...