Forge version: 14.23.4.2759
Twilight Forest version: 3.8.716

Steps to reproduce:

1. Set tfEnforcedProgression to false
2. Run around the biomes that are affected by Progression, making sure they are locked

What I expected to happen:
Weather effects shouldn't render.

What happened instead:
It seems that the weather effects continue to play out, despite having set tfEnforcedProgression to false. The structure protection still plays out normally (as tested with a Lich Tower before having slain a Naga). The weather effects do not induce their effects when walked in to, so it appears to just be a visual discrepancy.

Hopefully c587036 will make this work more reliably.

As far as I can tell, this happens if you change the game rule while in the dimension - as the change won't immediately be synced to the client, you'll still see the visual effects.

Unfortunately, as the game rule is set by a vanilla command, we aren't notified of the change. We could poll it every tick to check for changes, but I'm hoping MinecraftForge/MinecraftForge#5152 will provide for a better solution.

Ah yes, I forgot to state that.
I had changed the gamerule within the dimension, no restarting of the world/game, or changing dimension.

Looking into this further, we do attempt to intercept the /gamerule command being sent to handle notifying clients - perhaps this isn't working properly?