Make sure you are on the latest version, the icon should be purple. like shown in the workshop.

Unsub and resubscribe to the mod to ensure its updated.

Might be another mod making this mod lag.

Some unique error on your side that makes the materials and shaders glitch out.

Make sure you don't have your fps capped really low otherwise your game is anyway going to run really bad.

If anyone gets a lag issue or any other user side issue and is able to fix it. Please post it here so others can fix it also