For some people, like me, Terregan just isn't working. To my knowledge we're doing nothing wrong. Not turning, maximum bricks per second is high enough, and we're doing it just as it seems like we should. Place an 8x cube ghost brick, and hit start. But When I do that, it at first builds a nice little piece of terrain. Then if I move in ANY direction, forward, left, right, backward, (turn or not), My Blockhead begins to flap his arms trying to build and place bricks where he cannot. If you pause it, then move or something, then unpause it, the same thing seems to happen. If you go into your admin ball, same thing.
So far I haven't found any reason why this is happening. :/
I know some of these things I should not be doing, and will cause glitches, but a lot of the things I'm doing should not.