QuikQuak has released RaySpace for Mac OS X in the VST format.
RaySpace uses real-time ray-tracing techniques to analyze hand drawn spaces created by the user. Essentially, you just move the source and listener locations around, draw walls to make enclosures, and listen as the surround impulse responses are made on the fly.
Rayspace uses up to 512 different ray-traced sound directions, each one continuously collecting information from the enclosures. Taking into account air absorbency and the effect of each wall reflection and filtering made en route to the listener.
RaySpace does not use any smearing filters, or any convolution algorithms. It simply bounces the rays around the scene and returns a clean but complex effect back to the listener.
RaySpace costs $90 and a demo version is available. The Mac OS X version is free for registered owners of the Windows version.
