Here's a more direct video, notice the whole terrain vanishes in the occlusion buffer. Just the V shaped plane I use for terrain remains fixed and flat, because the vertex shader that shapes it isn't accounted for. My gas station isn't occluded by hills because of this.

LOD-ing heightmap terrain in Godot, a day well spent :D It's replacing a 3D mesh I made in Blender, and unsurprisingly... It's already waaaay more efficient. Also a nice excuse to get triplanar texturing in, even though I don't need it for this.