Well the FrustrumCamera seems to be the most '3D' like camera - at least it only has one zoom value.
I would like to see a simple graphic of how a papervision frustrum camera compares to any other 3D animation camera...
http://home.metrocast.net/%7Echipartist/BlensesSite/NewFiles/FOV-Basics.jpgIt is very encouraging that NElizaga (Nicolas) was able to match an ADOBE after effects scene to Papervision. I would love to see the source files or a tutorial on that!
In regards to the original thread (screen space to 3D space...) without a formula to accurately map the FrustumCamera3D perspective distortion in 3D I've resorted to using mouse3D on a plane in front of the camera to attach a 3D object to the mouse at varying depths in 3D scene space.