[quote=“gismofx, post:34, topic:2808”]
but whenever I import a WRL file converted from STEP file, I have to scale it down by a factor of .3937 = cm -> inches.[/quote]
this is historically the way in which 3d-viewer is rendering units… this is not going to be changed, so any wrl model has to be scaled or when created, or you will need to add a scale factor inside the wrl model place dialog in kicad
The best option is to scale the model when you create that, for a better mechanical integration…
here there is a set of tools for mechanical collaboration in kicad
the only requirement is a working copy of FreeCAD (0.15 and later)
these tools are compatible with kicad from release 4022 to stable (4.0.2) to latest dev version
and here a thread about the new mechanical library that is useful if you want to have a mechanical design of your kicad project