&quot;A Pixel Is Not A Little Square, A Pixel Is Not A Little Square, A Pixel Is Not A Little Square! 
(And a Voxel is Not a Little Cube)&quot;<p>From:
Technical Memo 6
Alvy Ray Smith, July 17, 1995<p>Link:
<a href="http:&#x2F;&#x2F;alvyray.com&#x2F;Memos&#x2F;CG&#x2F;Microsoft&#x2F;6_pixel.pdf" rel="nofollow">http:&#x2F;&#x2F;alvyray.com&#x2F;Memos&#x2F;CG&#x2F;Microsoft&#x2F;6_pixel.pdf</a>