91-11/Virtus.info Virtus Corporation of Cary, NC is marketing a low-end ($395) virtual reality package for the Macintosh called Virtus WalkThrough. The program allows the user to quickly create 3-D environments while moving around and through them. Frame rates are currently in the range of 1 to 10 Hz on a typical Mac II with no accelerators. The observer is controlled by mouse movements, and all rendering is done directly to the screen (no additional hardware required). Upcoming developments include real-time texture mapping and user interaction with the virtual environment... Virtus can be reached at: virtus@applelink.apple.com