Hi DesuDeus,

> So the workflow is doing some parts in T-Splines and then
> boolean them together using MoI 3D

Yup, that direction (T-Splines to MoI) should work fine.

There is a T-Splines command: tsConvertToRhinosurf which converts a T-spline object into a just a regular Rhino NURBS object.

It looks like T-Splines will automatically do that conversion in many cases as well, but I'm not sure if it will do it for copying stuff to the clipboard or not. You may need to run the tsConvertToRhinosurf on your T-Spline first before copying it.

- Michael