floating rock island 3d model

A massive floating island terrain base mesh. The top surface is perfectly flat with a wide circular crater in the exact center. The center crater leads straight down into a large, perfectly cubic hollow cavern space inside the island. A small, square-shaped tunnel entrance is located high up on the side cliff, connecting horizontally to the inner cubic cavern. The bottom of the island is an inverted jagged rocky cone. Bare gray stone texture, solid rock, unpopulated, empty nature, no buildings, no trees, plain 3D game asset.