Hi Michael, I must have misunderstood what the goal of importing an STL file was, since in the first message was mentioned reverse engineering programs, something that actually comes up in professional work, because laser scan data are point clouds that get turned into polygonal 3D files.

In fact, many professional CAD packages let you import mesh files and then reconstruct them using tools that allow you to build on top of the references.
I often work with this kind of data format myself, STL files, and then do the reconstruction file over 3GB and some files I'm working on are over 2GB STL, and I had to reduce them because the full model is over 50GB of RAW data.

So that’s why I suggested this approach, considering that Moi3D doesn’t have a way to import STL files, except for some JavaScript scripts, and I figured that having a STEP file, even if polygonal, could let you do the reconstruction right inside Moi3D's tools.

Cheers