* wanders into thread *

This is about the best I've been able to manage, in P6. All procedural materials ... no maps.

I added a point light to the center of the ring to illuminate the surroundings. The brightness at the center of the event horizon is actually an ambient setting, and not caused by the point light.

Took about a minute to render. It'd look a bit better with some postwork to soften and diffuse the glow, but this is a direct render out of Poser.