heraldic shield 3d model

Generate a low-relief 3D family crest in a classic shield shape, designed as a single solid plaque for CNC carving or 3D printing. The crest should have a raised outer border and bold raised symbols with clean, simple geometry. Main symbol: [main symbol]. Supporting symbols: [secondary symbols]. Style: traditional heraldic, symmetrical, simplified, no tiny fragile details, no deep undercuts, no ornate filigree, no thin projections. The model should look like a carved plaque with crisp edges and manufacturable shapes. Keep all elements thick, connected, and suitable for machining.