Not much with regards to documentation has been written. You should have
knowledge about l-systems, then look at ther examples.

If you want to fool around, try this

   lsys -Ilib lib/mycelis_muralis.l 2 100

and make sure you have the opengl interface working. A opengl window
should open, and each time you press the escape-key, a new iteration will
start, i.e. the "n" argument of the root module will be incremented (they
could be floating point, too, of course).

To check out example with many modules, you should use the -m switch:

   lsys -Ilib lib/fractint.l 1 20 -m Koch

(not all of these work).

Have fun!

Marc Lehmann