Thanks! No glue or epoxy, just careful stacking. The "mound" on the right isn't really that high. The rock in the front is sitting on two uglier pieces that are sitting on the bottom. The anemones give it the height when they are fully open, balancing out the real height on the left. When I do a water change or when the nems get mad by me poking around - they shrink down and the tank looks weird, mainly because it just looks different with just plain live rock on one side.This looks awesome, did you use glue at all or just stacked carefully?
On the left is more careful stacking. If you see that flatter rock on the top left, I bought that piece purposely (I'm currently trying to grow-in a platy garden, we'll see if it works). If I were to lift that up, you'd see a rather sizeable cave underneath. Fish love to break and hang out there. In other words, this isn't a solid mountain stack.
I'll say again though, if I was starting fresh with dry rock, I'd sculpt something to give me the look and flow that I want. The one drawback is that the area underneath has extremely low flow. Like I said, fish love to hang there occasionally as a break from the current, but it is also likely a dead spot for detritus. Though I'll tell you, with the occasional vacuuming of the sand underneath (requiring me to move that "cap" rock), I've never had any problems that I would attribute solely to that spot.