Check out this fake title screen
The original Playstation has a few graphical nuances that, for whatever reason, I really enjoy. There’s subtractive fade-to-black, which makes everything seem really rich and inky. There’s the point sampled textures, which gives the world a noisy crunch. There’s also a weird jitteriness to the geometry, which I believe has something to do with the Playstation’s lack of floating point numbers.
To try and emulate that last effect, I wrote a simple vertex shader that rounds vertex positions to a chunky lattice after having been transformed into camera space.