Create attractive rendering for Autocad 3d model.
You can try export model to 3ds Max, and use V-ray Render
The Render Tab situated on the 3D Modeling offers a variety of tools which are used to personalize the rendering image according to the material and the aspect or background image.
Answered with a tutorial: https://grabcad.com/tutorials/how-to-create-rendering-like-original
I just started using Autodesk Showcase 2015, free student download if you are interested. It makes very decent renders.