Tom Forsyth on Nostr: The only geometry here is the outer box - 18 verts, 32 tris. The pixel shader is ...

The only geometry here is the outer box - 18 verts, 32 tris. The pixel shader is doing all the hard work stepping through the heightfield. The clever part is that it has to trace LINEARLY in world space, but that translates to a CURVED line through heightfield space because of the animation.