Learn Autocad Designing Course in Karachi. We Offers All Types of Basic to Advance Level Courses. Enroll Now! In earlier releases used primitive entities – such as lines, polylines, circles, arcs, and text – as the foundation for more complex objects. Since the mid-1990s, has supported custom objects through its C++ API. Modern AutoCAD includes a full set of basic solid modeling and 3D tools, but lacks some of the more advanced capabilities of solid modeling applications. Which meant better navigation when working in 3D. Over time, it has become more easy to edit 3D models. The mental ray engine was included in rendering; it was now possible to do quality renderings.