I was playing on my main world when my game crashed. I though it had to do with me as I broke a torch. (I was playing split screen) Once the game restarted, I went to my upper levels to talk to an NPC. The game crashed again. I attempted to do so in single player, crash. I restarted the Xbox, crashed again. I played around with it and found that only in a region of my house, over a specific height value, the game crashes. I do not believe this to be a model error, as it crashed in areas with different things on the screen. I would say it would be a chunk error, but I don't believe Terraria uses chunks. I wanted to report this bug and request help as I have spent an absurd amount of time on this world.