How to see the original lightsim:

    cd lightsim
    python lightsim.py

    Play with sliders.


How to see the new lightsim:

    Start 3 shells, and in each one set this:
      export LIGHT9_SHOW=/path/to/light9/show/dance2008

    You may need a 'chmod 755 bin/*' if this is a new darcs checkout.
    
    Shell 1:
      bin/dmxserver --dummy

    Shell 2:
      bin/keyboardcomposer --no-sliders

    Shell 3:
      bin/lightsim
      (it spews tons of Qt stderr, unfortunately)

    In the keyboardcomposer GUI, bring up any combination of these subs:
      house
      midleft
      midright
      red
      orange
      green

    As you adjust subs, lightsim should rerender its combination of
    channel photos. I didn't have any properly-photographed lights, so
    all you get are some lousy hand-painted lights on a single photo.