What exactly do you mean by "render only as a single pixel"? With a low enough resolution sensor, the sun would render as a single pixel when observed from earth.
A guy who worked at the undergraduate computer lab when I was in college in the 90's was bemused by all of the print samples and signs by the laser printers, so he made his own:
The caption read, "This is Chris rendered in one color at 1 DPI on the Dinotronic," underneath a 7x7 monochrome portrait of himself.
The caption read, "This is Chris rendered in one color at 1 DPI on the Dinotronic," underneath a 7x7 monochrome portrait of himself.