A free demo version, fun to play with and also to check if the full version will work on your intended PC.



All you need to do is login or register using your email address.

The simulation is the same size as the full version.


  • a beam source (four otheres in full version)
  • a model of a simple block (nine others in full version)
  • block has fixed refractive index (models in full version are controllable )
  • no tools or loggers (eight in full version)
  • no pause button or clipboard/save buttons
  • a button to clear ripples and a drip button (so it's still fun to play with!)