UsdImagingGLEngine why GL in the name?

[sukoy]

Hi

UsdImagingGLEngine seems to be the entry point to render a usd scene, it can load and render with different renderer delegates if so why GL in the name? is it a typo from the past?

Thanks

[sukoy]

Is it only a reference to a graphic library or is it an explicitly reference to opengl?
I'm curious, that's it