There is a special section about 3d models in the Tutorial: How to make a footprint in KiCad 5.1.x (From scratch)?
And also in Library management in KiCad version 5
There is a special section about 3d models in the Tutorial: How to make a footprint in KiCad 5.1.x (From scratch)?
And also in Library management in KiCad version 5