collision detection for sprite3d

[aszid]

well, i've been working on a game *thinking* that this feature was already available (because i remembered seeing it in the 2d sprite stuff) but anyhow, by the time i had a need to worry about collision detection, i found that no, there isn't any for sprite3d.

I've considered converting my program to use 2d sprites, but the loss of functionality is kinda something i want to avoid.

anyhoooo, there you have my request.

(if anyone out there knows a good method to do per-pixel collision with sprite3d, PLEASE help me out, i'm quite lost as to how i'm going to do it)