I understand you're implementing a new equation system - if it's not already planned, would it be feasible to accomodate more customize-able variables? Specifically, I'm trying to make certain sky textures update based on persistent data from KubeJS. If I'd need to hack something together that's fine, but as it stands it seems entirely impossible.

KubeJS integration is something I have thought about, but as of right now, with Celestial being a purely client side mod, that isn't possible yet. I am going to be adding server integration to Celestial, so when I get around to doing that, KubeJS integration will probably be high on my priority list.