Yes, this does generate a considerable amount of lag especially if done in such an abundance as a terrain. Once upon a time all bricks were static shapes, they were so inefficient and laggy that they were swapped out with a fxDTS system which allows a whopping 214k bricks, but static shapes are the way to go if you want flat out shapes in Blockland that you can make whatever out of, fxDTS bricks can't do it to that level.
