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[HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_WEBGL_HLSL_SHADERS] "iexplore.exe"=dword:00000001

Ack, I hope GLSL shaders are well supported. It would be terrible to have to write a whole second set of shaders in HLSL for IE.

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I agree that GLSL shader support would be awesome, but if IE didn't support GLSL we wouldn't have to hand-write our HLSL. Chrome and Firefox for Windows already use ANGLE, which translates GLSL shaders to HLSL [1].

Unfortunately, complex renderings can produce some tough-to-debug problems when things get lost in translation. The good news is that ANGLE is still quite good, actively improving, and it allows automatic translation of GLSL to HLSL.

[1] https://code.google.com/p/angleproject/

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