There was an article on Everyday Flash Blog (http:// www.everydayflash.com/blog/index.php/2008/07/07/pixel-precision-in-papervision3d/) which covers this in Papervision. The formula used for this was as follows:
3dobj.z = (camera.zoom * camera.focus) - Math.abs(camera.z) It relates to the object position rather than the camera position, as your brief example shows. I'm not sure how similar the cameras are between Away and PV, but perhaps the article could help? - Micheal
