DOOM Demonstration WADs for RMB special effects:

RMBDEMO1-4.WAD all replace level E2M1.

All levels are optimised for HMP - other levels of difficulty are
implemented though: play-testing and feed-back requested.

DOOM 1.666 is recommended but not obligatory. HOM's occur with RMBDEMO2
with versions prior to 1.4 because of edge overload. Sorry. 

Here is a short description of each level (or at least, of the special 
effects introduced by RMB, without giving too much away!)

RMBDEOM1: Feeding time...
  Demonstrates RMB's ability to make some sectors safe from attack for 
  scary effects. I'm not telling you which sectors, though...

RMBDEMO2: Ambush
  Demonstrates the ambush capabilities of the BLIND and INC options.
  Also demonstrates how GROUP can be used to really speed up processing.

RMBDEMO3: Befriend the Shadows
  Shows more subtle use of RMB to make a difficult level more feasible,
  providing the player applies a bit of logic to the situation.  The
  clue's in the title. Also speeds up RMB a bit by excluding some sectors
  from consideration.

RMBDEMO4: Be quiet
  Also demonstrates the ambush capabilities of BLIND and INC, and 
  demonstrates how you can give the player some problems:
  can you sneak past the cyber demons without waking them?