Learn AutoCAD 3D right from scratch with full-length courses, instructor support and certificate all for one Subscription here https://www.thesourcecad.com/autocad-3d-beginners/ This tutorial will explain the most fundamental concept of 3d modelling ie using co-ordinates in autocad, without using co-ordinates in autocad you wont be able to make complex 3d drawings, the tutorial covers all the basic parts of 3d co-ordiantes.