odd ball question

[txbob]

also posted on PC page...

HI all... Thanks for all the help here...

I need to do the graphic representation of a black hole...Like the glowing outline of the object's polygons...

Here's the curious part.... This object (there are actually 2 of them) are turn tables on a DJ rig, and as the camera moves around these "holes" need to be seen only from the top, and when you look in them, they aren't showing the scene.....just this warpy grid thing....

think 3d simpsons episode..... but only seen when looking in the turntables...

I hope I explained this well enough to get some answers or comments...

[Matt]

do you mean you want to render the object in wireframe?

[txbob]

The object will be rendered with polygon edges and a bit od glow... but that's not the issue.... I want to be able to pan around this object, but when looking "into" the turntabels, it extends into a different dimention... (I know it sounds weird, and this is hard to explain.... if you where here I'd use hand signs that might make more sence....)


2 turntables... pan around then... look into then and it's a different scene...
I figure that I'll have to use a composite to do the shot, but I'd like it to work in one scene so that I can alter it to fit the sequence...

[stib]

well, if you pan the camera around so that you're not looking down the black holes then you won't see the black holes. So it could be done with sensible camera placement. Or you could dissolve the black holes in as the camera tilts up to view them, or better yet use some other transition instead of a dissolve.

Alternatively the black holes could appear and stretch downwards as they came into view.

As I understand your question, the problem is not that you don't know how to create the image, but that you haven't fully visualised what the image is that you're trying to create.

[txbob]

I have the " hole" part figured out... I guess what I'm wondereing about is how to make this part of the animation not visable as the camera pans around.... Then when it pulls up into an downward looking angle, there is the effect..

The shot requires panning, so faking the shot out isn't an option. I have figured out how to do it by rendering two passes, and compositing... I was just kind of wondering if there might be a quicker way to handle it.