Thanks. I don’t think I have a problem with the libraries. I think I have a problem with rendering the 3D file.
(don’t know how to add a pic here, so do it with ref.)
In this tutorial Tutorial: How to make a footprint in KiCad 5.1.x (From scratch)?
the second picture shows the 3D pic of the selected component. In my case it is a black field, whichever component or *.wrl I select, nothing is shown.
I can select a footprint which is displayed very nice (like first pic) but it looks like the 3D file is not rendered.