Here are some common questions and answers about the I3D tool kit:
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Q: Can I use I3D with Pascal? (or COBAL, or Prolog, or Visual Basic...)

A: I3D is designed to be used with C or C++. If you'd like to use
   I3D with another language, we suggest that you learn C instead, it
   is the industry standard for graphics after all.


Q: Why doesn't I3D run as fast as Game_X?

A: I3D is a flexible 3D raycasting engine that gives similar performance
   to early 3D games. It allows many features that other engines do not.
   This flexibility comes at a small cost in raw speed.

   Be sure that you are comparing I3D's performance with the same size window,
   same features, etc. You will find that I3D's performance on 486/33
   or better machines to be comparable to most other raycasting engines
   when run with a similar setup.


Q: Why does I3D run slowly under Windows?

A: Once again, compare the SAME SIZE window and you will see that I3D only
   runs about 10% slower under windows than DOS. (The Windows demo starts
   with a 400x300 window.) This performance loss is due to the slowness of
   Window's bliting. Some high performance VGA cards may improve this.


Q: What is raycasting?

A: Raycasting a is simplified way of doing a limited 3D enviroment. It lends
   itself to texture-mapped interior worlds quite well. It does not involve
   3D polygons, Z-buffers, or Phong-shading. Within these limitations,
   raycasting can be quite fast - much faster than most texture-mapped
   polygon engines.
