ctmconv combines all meshes from .obj file into one large mesh

[RhianneMoll]

Hi Daniel,

I am trying to import a complex model in a Wavefront obj file into FreeCAD, but since I am having trouble in that department, I thought I'd convert it to a different format first. That path led me here.

I am able to see that the .obj file contains many separate meshes, but when I convert it to .stl (FreeCAD's STL handling is robust), all the meshes are combined into one large mesh. I tried a few other formats as well, all with the same result.

Is this behaviour expected, or are there some tricks I can try? My understanding of the OpenCTM specification is non-existent and I may be barking up the wrong tree.

Thanks in advance!
Rhianne

[arthurlataks]

I have encountered related issue - when converting the following .stl I receive a message that "The mesh is too large to fit in a 3DS file", which, most likely is due the fact that for .3DS the number of vertices and polygons per mesh is limited to 65536.