Thank you for the information, was just informed about this variable in config in the discord and it does indeed help! Thanks a ton.

My PC is pretty old, Phenom II X2 545, 4GB DDR2 800mhz RAM, GTX 660 connected on PCI-Express 1.1 x16; the preview generating is much slower for me than going into the game and restarting the map. I feel like being able to limit the generated map preview's tiles range would alleviate my issue. Video ...