rock island 3d model

A massive, monolithic aquarium hardscape structure designed as a central "rock island." The aesthetic is smooth, highly eroded grey river stone with soft, rounded contours. The Structure: A single, sprawling formation with a wide footprint (implied 20 units wide by 15 units deep). It features a minimum of 5 distinct, large, open-bottomed archway entrances spaced strategically around its entire perimeter, leading into a vast, interconnected cavernous interior. The bottom edges are flat to sit flush on sand. The Roof Garden: The top surface is organic and thick, featuring 10 to 15 deep, bowl-shaped planters molded seamlessly into the rock. Crucially, these planters must be deep depressions (approx 2 inches deep) with an opening diameter of 2 inches, designed to hold substantial plant root balls. They should look like natural mortar-stone grinding bowls integrated into the cave roof.