Edge loop 3D models are polygon-based for organic, deformable shapes (prioritizing topology for smooth animation), while CAD 3D models use precision solid/surface modeling for engineering/manufacturing (focused on exact dimensions and manufacturability).
- **Edge loop models**: Used in games/animation—structured edge flow supports rigging (adding bones) and subdivision smoothing (e.g., a character’s knee bending naturally). - **CAD models**: For functional designs (mechanical parts, architecture)—exact measurements (e.g., a shelf’s load capacity) and compatibility with tools like CNC machines or 3D printers are critical.
Use edge loop modeling (e.g., Blender) for stylized characters; choose CAD tools (Tinkercad, Fusion 360) for practical items like a phone stand.