3dfx did design some tricks into the video pipeline on Voodoo 2 and 3 cards that allowed for what they called 22-but color, and it definitely looked better than other 3D accelerator cards’ 16-bit modes - but it was still not as clean looking as true 32-bit color. (Interestingly, the filtering they did was applied after the framebuffer, so screen captures would only ever show the lower quality original.)
It was Comanche on my Dad's shitty office pc that allowed me to appreciate big pixel 'shit' graphics.
Duke3D -> Quake (software rendered of course) definitely fit that description