MathMod
https://sourceforge.net/projects/mathmod/
https://github.com/parisolab/mathmod
File Support : OBJ
Pros/Cons: Interesting features that are not found in many modelling software (generate surfaces by using mathematical equations ; animation and morphing with time parameter) but it remains a particular use.
Platforms : Windows, Linux, MacOSX

I would have liked to see images that come from sources like finite element analysis and from an analysis of a system model.
The effort needed to generate these images is unknown. What make software valuable is ease of use.
For example I have been using MATHcad for decades to build models of mechanical, fluid, and electrical machines. The reason is that the analysis is easy to share with the people that must review it since it presented as if it was from a text book. The 3D graphics is limited for MATHcad7 to 25 x 25 matrix. But 99% of my model results is presented in 2D graphs.
How does MathMod compare against OpenSCAD? What are some of the major differences?
https://grabcad.com/groups/free-cad-cam-software-options/discussions/openscad-2d-3d-programmatic-cad