My world worked fine for a long time, Eventually it stated to get a bit laggy. Now when I load my world, when i load in it's fine, but once I start moving around and another structure with bits loads, the game freezes then crashes. I've tried updating graphics drivers, on both video cards. I bumped up my ram allocation to 10 Gigs, I updated java, I tried everything. So I backed up my world, and removed the mod. When I loaded the world up everything was perfectly fine.

So I know that the issue is from this mod. I easily have a few million bits in my world now, I'm working on a massive project. I'm gonna be really bummed if I'm out of luck here. It's a very special project for me, It's going into a special map for hundreds possibly thousands of people to be on simultaneously. I have concerns that If I cant resolve this, and get it to work on single player, in it's current barely done state, There's no way its gonna work on multiplayer. This is going to be a massive event, and I'm using this mod to add plenty of detail.

Is there any potential cause I can fix? Or am I just out of luck?

Keep in mind, I'm running Minecraft on an RTX 3080 and 10Gigs of Ram. It was fine on 2Gigs, but I bumped it up for this.

Depends do you have other mods installed?
I can take a look at the world