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Nice! Not too familiar with how that'd be done in Godot but my overall plan for when I exit CPU/debug-land is to either normalize and remap the height difference + velocity to nicely fit the values into a texture or straight up use some sfloat format. I'm sure I'll run into issues here and there tho

Looks Normal to me! At least on the surface :V

I have a modest and very realistic end goal of recreating the vibe of the water shader from that "In the Valley of Gods" cut trailer scene, and this is step #1 👀

Much simpler than that, but I did stumble into FLIP during my maddening descend into the rabbit hole of fluid sims. It's just a height field water surface simulation based on this lovely vid. The whole series also helped me grasp the logic around FLIP and Eulerian fluid sims; but that's for later 👀