Another case of undermining the strength and effects of black holes.
If you were near enough to witness the bending like this, you'd already be dead. In fact, so would be the entire solar system you were in. The hole would have long ago destroyed it, even before arriving "in" it - the planets' orbits would have gone nuts, soon been either slingshot away or gotten torn apart by the gravity. The system's star would be in the process of being sucked in the hole like a long spiraling spaghetti, and you would definitely see more than just a fish-eye effect... The accretion disc would glow intensely, and all the matter falling in the event horizon would create abominable amounts of radiation that alone could, I believe, sterilize the whole system, if the gravity hadn't already finished everyone off. Oh, and I don't think the jump nodes could have survived the arrival of a singularity in their vicinity either.
So, you can't have a black hole in the game. If the engine knew how to handle a gravity source (it's not newtonian, I don't know if it could be easily modifed to, e.g., calculate a constant pull?), and you know how to implement it, be my guest. It won't be a black hole, and would be a physically impossible arcade-ish thing, but then again so is the whole airplanes-in-space approach of FS2.