Just out of curosity has anyone here pulled off constructive geometry like adding and subtracting solids? I did see it in a demo once.
What sort of effect do you mean?
Can you describe it a bit more?
[Btw I split the topic because this seemed like a question on it's own]
Imagine taking a sphere and a square bar 3d object. Stick the square bar through the sphere and subtract it away leaving a square bar shaped hole through the sphere. Extend that to all kinds of shapes so you can add/subtract one shape from another. It's called CSG - constructive solid geometry.
And, no, except for the most trivial stuff, I've never done much with it.
Jim
Ah, in that case I've never done it myself but I have seen in done in a demo..
http://www.pouet.net/prod.php?which=24952 (http://www.pouet.net/prod.php?which=24952)
It's a pretty neat effect!