Whenever I go inside a building or cave, the game slows down terribly. I'm running the game in administrator mode with both "-doublebuffer" and "-no3d" commands and I'm using Windows 10.

Can anyone help?

[edit] It seems I can work around the problem by saving my game and restarting Arcanum when I enter a dungeon. It's not ideal, but it's relatively fast to reboot the game.