Thanks! The answer is: sort of, but not really. The maker page[1] has an "export data" button that writes out the vertex data (as a big series of RGB/XYZ values), which you could easily convert to whatever format.

But if you rendered the data somewhere else, you wouldn't get the right effect unless you replicated the perspective/FOV that I used (which are completely ad-hoc because I had no idea what I was doing).

So currently there's no super-easy way to take the data somewhere else and do something useful with it.

[1] https://andyhall.github.io/glsl-projectron/index.html