The first challenge in 3D modeling is being able to see your three-dimensional model on a two-dimensional computer screen. The normal model space view on the Model tab in the drawing area shows a single, projected 2D view of your model — the top-down, “plan” view by default.
AutoCAD provides two model space capabilities that enable you to escape this visual flatland:
No matter how much or how little 3D modeling you're thinking about doing, it's well worth your while to set up a template. (I fill you in on drawing templates in Chapter 4.) If you've ever started a new drawing, you're probably aware that AutoCAD already comes with a template for 3D modeling named acad3d.dwt (or acadiso3D.dwt for the metrically inclined). This is fine as far as it goes, but it only shows you a single view of your model. The next section explains how to improve on this template.
Model space viewports enable you to see several views of your model at one time, each from a different viewpoint. For this reason, model space ...