TerraCustom hangs upon finalizing worldgen [v0.6.1]

[kinker31]

Whenever I attempt to generate a 16000 x 2400 world (or anything larger than the vanilla world sizes), whenever the program is actually able to generate the world and not crash from a OutOfMemeory exception, the worldgen always hangs at the last step before finalizing the world. The program itself doesn't hang, as I'm still able to move the cursor around and watch the background scroll by, but from what I've seen from WorldGenPreviewer, the worldgen completely stops (usually at Generating Planetoids, me having Calamity) and doesn't generate anything at all.

[World size is 16000 x 2400, dungeon, beach, and temple set to 200%, all pre-hardmode ores generate at 50%, King Slime, Queen Bee, Eye of Cthulhu, and Skeletron are set to be pre-downed, Stylist, Goblin Mechanic, Barkeep, Tax Collector, and the Angler are set to be already found, backgrounds shouldn't matter much with worldgen, chest spawning is set as normal except for underground cabins [50%], as are the microbiomes, and I've disabled pots.]

I'm not sure if this is a bug or a problem on my part, but help on this particularly tight pickle jar would be much appreciated.