Modalys, Ircam's virtual lutherie technology, was introduced as early as 1989 and has always been enhanced and maintained since then!
Modalys 3.8.1 is a significant maintenance update that brings a lot of bug fixes and improvements, especially to the (relatively) new Lua engine.
The mlys.lua controller, introduced in Modalys 3.7, carries out the idea of a new scriptural approach within the graphic and real time environment of Max (making it the equivalent of non real time Lisp), allowing a bigger control over the details than with the traditional "mlys" graphical approach. This new approach is particularly suitable for 3D sounding objects (finite elements).