I always thought that the pixel was squared, until today the professor of my Computer Graphics course described the pixel as circular. When i came up to him after the class, he insisted that the pixel was more of a blob and he sited the book "Computer Graphics: Principles and Practice" by Foley as reference. Does anyone know for sure the shape of the pixel??? Even the tomshardware article "Birth of the Pixel" does not mention the shape of the pixel. Any info is appreciated!