how to 3d in autocad
there are many commands for creating 3D objects in autocad and we can also change 2d objects into 3d objects.
To create 3d objects in autocad, it is really important to be able to work within three dimensional space. So you should learn the basics of using 3D geometry (cylinders, boxes, spheres, cones, donuts), using 0,0,0 (X,Y,Z) annotation, and the use of faces, extrusions, paths, planes and so on.
how to design in autocad