#!F-adobe-helvetica-medium-r-normal--18* #!N #!CSeaGreen #!N #!Rall189 Rendering #!N #!EC #!N #!N The process of #!F-adobe-times-medium-i-normal--18* rendering #!EF an image involves a computer calculation of the amount of light falling on each visible surface of the objects in the "scene," as seen from the point of view of the computer "camera" (the viewer's eye point). During the rendering process, surface properties of objects are taken into account as are the colors of both the objects and the "lights" shining on them. In other words, a computer graphics renderer samples the scene in front of the camera at the resolution of the computer monitor on which the scene is to be displayed. Its sample space is the 3-dimensional "world" containing the objects. But the image renderer does not create a 3-dimensional picture; it only calculates the colors of the dots that can be seen on the 2-dimensional monitor screen from the chosen point of view. Any parts of objects that cannot be seen from that point of view are neither sampled nor rendered, nor are they stored in the image file or displayed on the monitor. This 2-dimensional image may appear 3-dimensional to our eyes because of shading, occlusion of distant objects by closer ones, and other visual cues that, in the real world, indicate dimensionality. Like any image, it is a representation, however real it may appear. #!N #!N #!N #!F-adobe-times-medium-i-normal--18* Next Topic #!EF #!N #!N #!Lall190,dxall191 h Positions and Connections Dependence #!EL #!N #!F-adobe-times-medium-i-normal--18* #!N
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