Hi. I hacked together a simple integration with Keijiro Takahashi's Klak ( https://github.com/keijiro/klak ) to allow procedural animation of raymarch inputs.

Grab it from here: https://github.com/IxxyXR/Klak-Raymarch 

I also plan to implement a custom timeline clip type for animating the raymarcher - maybe similar to https://github.com/keijiro/ProceduralMotionTrack

This is super cool, thanks for sharing!