A highly detailed 3D diorama of a deep-sea geometric alien grassland. The terrain consists of hexagonal basalt columns and glowing cyan grid lines. The grass is made of translucent, fractal-like crystalline structures and neon bioluminescent tubes. Polyhedral corals and metallic floating anemones. Deep ocean environment, bioluminescent lighting, underwater caustics. PBR textures, subsurface scattering, glowing emission maps, Unreal Engine 5 style, sci-fi game asset, masterpiece, ultra-detailed.