Time to do some serious optimization work. Gonna try and pull optimizations from Starlight: https://github.com/PaperMC/Starlight/blob/fabric/TECHNICAL_DETAILS.mdWish me luck! XD
Fixed the vertical lighting channel, Here's the game with all five sky lighting channels, and all the other sources of lighting too. Still incredibly laggy though, I need to work on that.
Yeah uh, actually I screwed up the vertical lighting channel. Without that it runs, though it's extremely laggy.