stone circular relief 3d model

Use the input image strictly as the base reference. Do NOT redesign or add elements. Preserve all outlines, proportions, symmetry, and line structure exactly. Convert into a stone bas-relief with increased depth only (mid-relief). Extrude only along existing lines: - Highest: eyebrows and forehead - Medium: eyes, nose, mouth - Lowest: mane and background The outer circular border must stay very low (1–2 mm), same thickness, and never exceed facial height. Do not change shapes or add details. Maintain exact circular frame and patterns. Material: weathered granite, subtle roughness. 3D print ready: watertight closed mesh, solid back plate (3–5 mm thick), no holes or self-intersections, uniform thickness, minimal overhangs. Strict: identical design, no variation, no deformation. Only increase depth from original lines. Clean topology.