A new maxscript modifier created to challenge myself.
Based on this tutorial in Softimage ICE : Softimage ICE Videos
Create a push deformation along splines, with a lot of controls, and a Curve control to adjust the profile.
You also can offset the deformation, and subdivide the deformation along the spline path.
You can animate everything, even the Curve control, with different animations on each spline.
When you play the animation with the modifier opened, you can see the Curve Control animated too.
If there are keyframes on the CurveControl, it's orange, when you are on a keyframe time, the curve is red.
If there is no keyframes the curve is green.
The math part was really easy to recreate.
The tricky part was to deal with the Curve Control UI to be able to save and reload multiple curves with animation.
It's absolutely not made for it, which is weird, because all the others UI controls can easily be saved.
But I found a kind of hack to get it work.