Hmm, may be a problem with your graphics card. What's your graphics card and bro...

eksrow · on Aug 17, 2016

Getting the same issue with chrome 52, windows 10 and a r9 fury.

[.Offscreen-For-WebGL-043C4318]GL ERROR :GL_INVALID_OPERATION : glReadPixels: demo:1

Issue with amd cards maybe?

erkaman · on Aug 17, 2016

Yeah, reading from floating point textures with `glReadPixels` is not really supported on some cards or browsers, it seems.

eksrow · on Aug 17, 2016

I just checked chrome://gpu and it shows:

Canvas: Software only, hardware acceleration unavailable

and some other 'Problems detected' so the problem is probably on my side.

Cool project though!