Sophie: blender-manual-2.49a-1ark i586

blender-manual-2.49a-1ark.i586.rpm

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>Blender Documentation Volume I - User Guide: Last modified April 29 2004 S68</TH
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>Antialiasing</H1
><P
>&#13;			A computer generated image is made up of pixels, these
			pixels can of course only be a single colour. In the rendering
			process the rendering engine must therefore assign a single
			colour to each pixel on the basis of what
			object is shown in that pixel.
 		</P
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>&#13;			This often leads to poor results, especially at sharp
			boundaries, or where thin lines are present, and it is
			particularly evident for oblique lines.
		</P
><P
>&#13;			To overcome this problem, which is known as <I
CLASS="emphasis"
>Aliasing</I
>,
			it is possible to resort to an
			Anti-Aliasing technique. Basically, each pixel is 'oversampled',
			by rendering it as if it were 5 pixels or more, and assigning
			an 'average' colour to the rendered pixel.
		</P
><P
>&#13;			The buttons to control Anti-Aliasing, or OverSAmple (OSA), are
			below the rendering button in the <TT
CLASS="literal"
>Render</TT
>
			panel (<A
HREF="x7735.html#BSG.REN.F.S68.301"
>Figure 12</A
>).
			 By pressing the <TT
CLASS="literal"
>OSA</TT
>
			button antialiasing is activated, by selecting one of the four
			numeric buttons below it, the level of oversampling (from 5 to 16)
			is chosen. 
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>Figure 12. OSA buttons.</B
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>					
			Blender uses a Delta Accumulation rendering system with jittered sampling. 
			The values of <TT
CLASS="literal"
>OSA</TT
> (5, 8, 11, 16) are pre-set 
			numbers that specify
			the number of samples; a higher value produces better edges, but slows 
			down the rendering.		
		</P
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>&#13;			<A
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>Figure 13</A
> shows a rendering with OSA turned
 			off and with 5 or 8 OSA samples.
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>Figure 13. Rendering without OSA (left) with OSA=5 (center) and OSA=8 (right).</B
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