rhino

Rhino is a versatile bit of 3D modeling software used for computer-aided design, computer-aided manufacturing (CAM), rapid prototyping, additive manufacturing, and reverse engineering in a variety of industries, as well as for multimedia and graphic design purposes. In Rhino, any geometry is based on the NURBS mathematical model. It focuses on producing a mathematically precise representation of curves and freeform surfaces in computer graphics instead of polygon mesh-based applications.

You will recognize many tools from MoI, which is based on the same principles as Rhino3D. However, during the 3D design process, you will often enter numbers to exactly place and shape models. On the one hand, this makes Rhino3D the perfect tool for mechanical designs; on the other, it can slow down the workflow.

If your heart is bent on NURBS modeling, Rhino is probably the best 3D modeling software for you. However, if you prefer a more intuitive approach, try MoI.