[TrevorSundberg]

Hmm, I think that polyfill might only be for WebGL1 (we use WebGL2). When I go to the WebGL1 report I see that my card supports both:

OES_texture_float OES_texture_float_linear

But on WebGL2, it only shows OES_texture_float_linear. I think OES_texture_float doesn't exist on WebGL2 I'm guessing.