Great presentation, loved the format! Looking forward to the other two parts.

I did a bit of ordered dithering on the ZX Spectrum Raytracer (https://gabrielgambetta.com/zx-raytracer.html#fourth-iterati...), it was surprisingly easy to implement and the results were great.

I wonder why it wasn't done more in the 80s (other than manual pixel art), probably just performance. I do remember seeing ordered dithering patterns in the 90s, in Windows 3.1 and in The Secret of Monkey Island VGA (I guess the backgrounds were hand-painted and scanned?).