prehistoric stone frame 3d model

Create a solid, 3D-printable prehistoric stone picture frame designed for an iPad. Overall Style: - Hand-chiseled stone appearance - Organic, uneven rock edges (prehistoric style) - Surface texture resembles weathered limestone - No sharp edges, maintain smooth but rugged stone finish Dimensions: - Inner opening: 8.12 inches (width) x 6.12 inches (height) - Frame border thickness: 1.5 inches wide on all sides - Uniform frame thickness (depth): 0.6–0.8 inches - Back side completely flat for 3D printing bed adhesion Geometry Requirements: - Solid body (no hollow sections) - NO angles or overhangs less than 55 degrees anywhere on the border or features - All surfaces must be self-supporting for FDM printing - All edges slightly filleted for printability - Design must be manifold and watertight Front Surface Details: - Prehistoric caveman-style hieroglyphics carved into the front border: - Dinosaurs (T-Rex, Triceratops, Brontosaurus) - Cavemen hunting with spears - Fire, sun, spi