Caliban07
Aquarium Advice Addict
Thanks for the observations. I used the word "loosely" because I don't have the exact number and shape of rocks to replicate that look.
Agreed, the valley should emphasize the height on either side. The "high back" came from another yet scape (not pictured) that presented a central apex in between the groups of rocks.
Will try to get paint this morning and hopefully apply a coat before going to the movies (wife reserved some tickets for prime seats at a local theatre for the new Star Wars movie).
I think I see what you are trying to do RE the high back. I think it's hard to get a full picture because of the water line. You can't see the shallow depth of the substrate at the front glass that would probably have given a better perception. I know you'll get it right.