View-dependent refinement of progressive meshes?

I'm looking for a Unity solution to create view dependent refinement of progressive meshes, as is described in this link:

http://hhoppe.com/proj/vdrpm/

TLDR: LOD poly reduction on the fly, based on camera angle/distance.

My goal is to use decimated photogrammetry data with this tech, along with Virtual Adaptive Textures (unity calls it "sparse virtual texturing"), without having to do a bunch of retopology and texture baking. I figured this was just how Terrain LODing worked now.

Anyone heard of such a tool?