Your car 3D model is messy usually due to unoptimized topology, disorganized layers/groups, or leftover temporary geometry from modeling.
- **Unoptimized topology**: Overlapping vertices, ngons (faces with >4 sides), or uneven edges make the model hard to edit and cluttered. - **Disorganized layers/groups**: Mixing parts like the body, wheels, or doors in one layer/group creates confusion when modifying elements. - **Leftover geometry**: Extra edges, unused vertices, or temporary objects add unnecessary bulk without purpose.
To fix it, use clean-up tools (e.g., Blender’s Merge by Distance) to remove redundant geometry, and group parts by component (e.g., "Body," "Wheels") as you work to stay organized.