C3D B-Shaper converts polygonal models to boundary representation (b-rep)
This new approach creates models from polygons while also recognizing curved parts, it is developed by the developers of the C3D geometric kernel, used in Russia By Ascon for their main CAD Kompas and on NanoCAD
https://c3dlabs.com/en/products/c3d-toolkit/b-shaper/
Maybe it can be an inspiration for a new idea for moi3d

Polygonal Mesh to B-Rep Solid Conversion: Algorithm Details and C++ Code Samples
https://habr.com/en/post/465237/

Would pay an extra for this tool in Moi. Thanks.

I am in love with MoI subD import, but this would complete the package. Very impressive!

Wondering how it solves more organic surfaces, like a face or a sculpted object, where the mesh topology is a 'mess'.
The process seems to recognize shapes like circles, tubes, spheres ... but the examples are really mechanical. How does it reconstruct trimmed primitives. The algo would have to inverse engineering models.
Seems too good to be true :O)