SeaOfPixels

Here is a comparison: 1.19.2, sky simulates the feeling of rotation by swiveling back and forth: https://github.com/sp614x/optifine/assets/62183036/0deef3b0-0c5b-44cf-93fa-e05084798615 1.19.3/1.19.4/1.20, sky literally rotates in a circle: https://github.com/sp614x/optifine/assets/62183036/37d1b4fc-e8eb-415e-8add-ef61ef99e435

They're the properties in the original post. Also this is the best I can show it within the constraints of video file size, I assure you it swivels like this...

Hoping OptiFine is able to account for and fix this on their end, thank you for looking into this.

Confirmed for OptiFine 1.20.4 HD U I8 pre1, according to the Twilight Forest team OptiFine removes a vanilla feature that the Twilight Forest needs, causing crashes and broken behavior

Can confirm, it seems that CEM chest models are not applying in the inventory. Really hoping this gets fixed soon, in latest for 1.20.4. 

This is specifically caused by https://github.com/sp614x/optifine/issues/7709, not CIT in general.

Can confirm, colormaps are currently incorrect. 

It's not that the colormaps are randomizing, it's that the gridmap IDs are incorrect. This happens all the time during OptiFine development when updating to new whole number versions.

> > It's not that the colormaps are randomizing, it's that the gridmap IDs are incorrect. This happens all the time during OptiFine development when updating to new whole number...

I think the current method would be fine if gridmaps didn't keep extending past the farthest vanilla ID (End Barrens) into the unused IDs. This currently breaks grid colormap compatibility...