Hi Micha, I think you'll need to use a polygon mesh modeler for that kind of "just unweld this one particular surface and not other stuff" kind of level of detail on the mesh processing.

It's difficult to include such very specific detailed functions in MoI's mesher, if it did all kinds of special purpose mesh editing functions like that it will end up getting a really complex UI pretty quickly.

Many polygon mesh editing programs should be able to handle what you need - you probably would want to export from MoI with welding turned off, then select the mesh pieces that you want to keep unwelded, invert the selection and then perform a merge vertices / weld type operation on everything else to weld all the other points together where they had multiple vertices stacked in the same location.


Also maybe I have misunderstood what you are asking for - do you want to actually keep the surfaces as separate unjoined surfaces in MoI but still make them mesh as if they were joined? But if so, that's not really feasible to do, the mesher can't make things work like they are joined without actually knowing which things are joined to one another, so there would have to be an additional full joining calculation done at meshing time in order to know that. That joining calculation can be a time consuming operation, so that's something that you need to do to objects before running them through the mesher, it's not something that the mesher can easily handle in addition to meshing.


> It's easier to extract NURBS surfaces than mesh parts.

This is not usually the case if you're using a mesh modeling program.

- Michael