no prob
I tried to incorporate as many of these architectural elements into my rockwork as possible, like features of a fine house. I drew my rockwork out on paper, from front, sides and top views before I started. Then I hand-pick rock, even cut rocks until I acheive my vision.
you can expose more of the sandbed by propping up larger rocks on upside down triangular rocks, or having 2 inverted L-shaped rocks come together to form a box. the increased flow over the sand does wonders and looks great.
you have to really exaggerate any feature as it will shrink over time when coral grow in.
have fun!