This plugin seems to generate the 3D objects in all the wrong places with the latest version of infinity (1.2.1 as of this writing). One example is in Poor Yorick, Some of the 3D objects will appear on the side of the cat walks you're on.
A zip file version of the old 3D Examples from the early days of Aleph One. Includes a plugin containing 3D models of columns and lights, and two maps for trying it out. Files originally created by "binhqx", and still available in .sit form here