Use the Shaded Viewport Options area of the expanded Plot dialog box to control this feature. In addition to viewing rendered and shaded views on the screen, you can plot them, whether they’re in a paper space layout or in model space. (To return to an unshaded view, choose View Shade 2D Wireframe.) As I mention earlier in this chapter, the 3DOrbit command’s right-click menu includes shaded modes that you can see even while navigating around your model in real time. To experiment with shading, choose any of the options on the View Shade menu. The SHADE command offers a simpler alternative to the RENDER command, without all the lighting, surface materials, and other options. For more information, navigate to the Render 3D Objects for Realism help page mentioned just before the preceding steps and then look at Create Rendered Images Use Materials in Rendering and Create Rendered Images Use Lights in Rendering. To make rendered images look less cartoonish, you need to apply materials to 3D objects and define different light sources. When you click Render, AutoCAD renders the 3D objects. You can get okay results without changing the options. Ignore all the options and click the Render button. The Render dialog box and a rendered object.ģ. The Render dialog box appears, as shown in Figure 8-12. Unless you want a monochromatic rendering, create the objects on several different layers that you’ve assigned different colors. Use the steps in the previous section or use one of the sample 3D drawings in \Program Files\AutoCAD 2005\Sample. When you’re ready to get fancy, choose User’s Guide Create Realistic Images and Graphics Render 3D Objects for Realism in the AutoCAD online help system. To see how rendering works with the default options in AutoCAD, use the steps that follow. A (rendered) picture can be worth quite a bit more than a thousand words. Rendered images are useful for previewing how your models will work in real life and also can be powerful tools for sales and marketing communications for your company. Rendering of simple scenes is now practical on a mainstream PC, and a fast personal computer can create some impressive images in a reasonable amount of time. Rendering has steadily improved in speed and usability as PCs have become faster, and programmers have improved their rendering algorithms. Even if you use animation programs, AutoCAD can be useful for developing the initial 3D models.
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If you want to create animations, you need to use other software programs such as Discreet’s 3DS Max. The objects that you see in movies such as Toy Story or A Bug’s Life are first created as 3D models and then rendered frame by frame - a process that can take immense amounts of time even on ultrafast graphics workstations - to produce the beautifully, well-rendered images you see.ĪutoCAD creates still renderings only. Multiple frames strung together produce computer animation. Handdrawn pictures of building facades were called renderings long before computers got into the act.)Ī single example of this technique is called a still rendering. (No, computer programmers didn’t have lard on their minds when they borrowed the word rendering. But in CAD, rendering is the process of illuminating a set of 3D objects with one or more imaginary lights and then creating a more- or-less realistic picture of the results. To my mother, who grew up on a farm in Iowa, rendering was what you did to fat to make it into lard. Modify Objects Change Existing Objects Modify 3D Solids for a description of the other options on the Modify Solids Editing menu.
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