aquarium cave 3d model

A modular 3D printable aquarium cave platform designed to be placed at the bottom of a tank and covered with substrate (sand or aquasoil). The model features a hollow central cavern with a wide front opening, creating a natural cave appearance. The top surface is flat and slightly curved to hold substrate evenly, with a hidden circular light channel in the center that allows light to pass through from above into the cave below. Include internal light diffusion tunnels for soft glow effect. Rock texture should be realistic, organic, and asymmetrical, inspired by natural stone formations. Structure must be strong, printable without supports where possible, with separate interlocking parts for easier printing. Ensure smooth edges, no thin fragile parts, and water-safe geometry. Optimize for FDM printing.