If you ever wanted to get genuine retro effects (PSX era graphics) directly implemented in your scenes, then usually that would be a tricky slope.

Henceforth we've developed shaders that have static dithering for materials and dynamic dithering during renders and compositing. Each is meant to be used separately, but it can also be combined for unique and experimental results.

Under all these super perks comes vertex snapping in the form of a faked version that works real well for large scenes, and a realistic vertex snapping effect that can yield accuracy for mesh closer to the camera. Everything is controlled through node groups.