My rockwork looks alot like the first picture he sent. I stacked mine like a wall (with plenty of caves) and i like it. I have a 2 foot tall tank so it should be stacked. The best way in my opinion to set up rocks is have the least amount of rock touching the sand. The less rocking touching the sand, the less die off, the les ammonia in your tank. Also you can sift the sand with alota room to work with if you stack your rocks more.