Doesn't work with OptiFine

Since OptiFine is generally very incompatible with everything, and I'd recommend against using it at all, I consider this a low priority issue.

If you need some OptiFine-specific features, take a look at this page, basically every feature is available as a standalone mod at this point.

I'll consider looking into fixing the incompatibility if I have some spare time.

Closing this as I do not intend to address OptiFine compat anymore, there is no longer any valid reason to use it over alternatives.