PolyFX v2. 5 is a maxscript, created by Bodyul Vladislav, enabling variously encourage the appearance and hiding procedural shaped objects.
Take a look at the following video to see what you can achieve with this script.
PolyFx2.5 Scripts For 3DsMax by Bodyul Vladislav
PolyFX 2.5 has a value of US $ 50, but you can access a Lite version for free.
Click here to go to the download site.