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You have several really great WebGL demos on your site, e.g. animation_physics_level

For some reasons they don't work in IE11 which has WebGL support. Is it because of Three.js or your xg library?

I try to push the limits of WebGL, I'm using almost everything there is, plenty of extensions (bear in mind these are not really exotic features, most are supported by majority of GPUs out there, native desktop games use much wider set of capabilities, it's just that WebGL implementations are only exposing them slowly).

In general Chrome has the most complete WebGL implementation, though Firefox does seem to be catching up recently (they do push for WebGL 2 so some features are popping up in WebGL 1 as extensions, but for example Firefox uses much older version of ANGLE and also no DX11 ANGLE in sight there, so on Windows Firefox is still quite behind Chrome).

IE11 WebGL on the other hand has troubles even just with basic WebGL specs, it still has broken and not implemented features, not even speaking about majority of extensions.

Is it possible to reproduce with something standard that most browsers can use, e.g. Unity3D or Flash?

You miss the point of a WebGL demo

Is the source of limitation browser implementation of OpenGL? Or is it a combo of the browser + OS? Or Browser + OS + graphics drivers?

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