To day, I was playing with ProWave modular. And, by browsing Zarg stuff, I came across Zarg key level device which I own since years ! And it's even better than a simple keyfollow module : you can add as many points you wish ! You can use it directly on the Scope window or in modular with RD insert module.

You'll have something like Kontakt modulation "shaper" feature or Falcon "mapper" or Roy's "freemod" device but drawable with as many points as you like and sync signal at the input. Sadly, one can't twist the line between 2 points but as you can add many points, you can draw the curve you wish....
Just a bad strange thing : the output fall to zero when the input signal is close to max.

But this is a very cool device that can allow to do very powerful modulation signal processing !