Importing 3D models

Before we go into the nifty details of 3D modeling and Unity3D, let's discuss first what 3D models are. In computer graphics, 3D modeling is the process of constructing and developing a mathematical and visual representation of any three-dimensional (3D) surface of an object via any 3D modeling software. The end product of that process is called a 3D model, or simply model, in the context of this book. The interesting thing about 3D models is that they are in 3D and any computer or laptop screen is a 2D surface, so it becomes a tricky task to display the 3D model in the horizons and bounds of 2D screens. So a process of displaying 3D models in the form of 2D images is used and this is called 3D rendering. It comes with 3D software tools including our very own Unity3D. This rendering process uses lights and cameras to render the 3D model as it's something real and it presents the image...