Grids are simple and effective ways to create large sprawling dungeons in Titan Quest. The region maximum size of a grid is 64x64x10. This means 64 blocks x 64 blocks x 9 height levels. One can make a much taller grid easily by linking portals of a grid on top of a grid to make something rather huge if that is what you want. Honestly, 64x64 is massive in size (equal to 320 by 320 terrain, 1 grid square equals a square 5 meters on a side)…. Don’t let it fool you. The Y Layer starts at “1” and goes up… to layer “9” (so layer 1 is always on the bottom, 9 on the top).