Humm this is my first time someone converted the board before seeing it in kicad itself… you have done the more difficult part, then you need to adjust something…
my libraries have already the VRML models coming from STEP models… have you copied them beside STEP models? is your VRML path fine for kicad?
is that image the 3d-viewer internal rendering or the export of VRML from kicad?
in that case have you correctly selected the option to export?
kicad StepUp will give you exactly the same render (pcb + parts, no silk, layers) in kicad pcbnew 3d-viewer and in MCAD sw but you have to read at least one time the guide!
you are not doing your homework 
[quote=“mangelozzi, post:33, topic:2542”]
I want to learn FreeCAD, and would be happy to help make libraries, like maybe the diodes.[/quote]
have a look here
