THEN you will know about photon emission and appropriate radius settings. THEN you will know about sampling settings to produce the finest edges instead of coarse lines. THEN you will know about portal light and other very cool stuff. THEN you will know about setting up the (very versatile) different types of lights. THEN you will know about caustics and such. THEN you will know about setting up your materials right in order to get the right bump-mapping, relief-patterns, cutout-patterns, transparency, translucency, reflections and refractions, self-illumination and so on and so forth. THEN you will know how to produce the difference between thin-walled glass objects or solid glass objects. THEN you know about things like "ambient occlusion", "final gather", "global illumination" and so many more shader types and stuff, which are implemented into AutoCad in a really useful way. Search the nVidia site for mental ray to learn more! I highly recommend this. There is mental ray in AutoCad as well! Same render engine used by SolidWorks and Inventor for instance and of course most of the CGI movies like Toy Story or such. Never rely on the predefined render quality settings. Ever fiddled around with the advanced render settings? Guess not. Well actually, if you know what you're doing, rendering in AutoCad gives you similar or even better results than PhotoView360 or something.
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