Hi,
Thank you for your enquiry.
It is possible to create pseudo-3D effects in OpusScript, using similar techniques to the ActionScript language in Macromedia Flash. In order to do this, you need to create a fake 'z-plane' which simply controls the scale of the objects in the publication.
Please see the attached publication for a demonstration of objects moving in 3D space with camera control via the mouse. In fact, you'll probably recognise the effect from the same
www.kirupa.com site mentioned in your post.
Kind regards,