½éÉÜ£º ժ¼ Although AutoCAD is primarily thought of as a CAD application used for 2D designs, it has a powerful 3D modeling engine that allows you to create 3D models of buildings or small parts used in a machine. 3D modeling in AutoCAD was introduced over a decade ago with AutoCAD R13 (and even before that as an add-on called Autodesk Modeling Extension for AutoCAD R12),but creating 3D models was very time consuming. In recent releases of AutoCAD, the 3D modeling features have been completely overhauled to allow conceptual designing in AutoCAD and to create high-quality presentation renderings with less effort....