However well intentioned your post may be in explaining this, it misses my point.
There's no single oldschool look, as people writing software renderers didn't have a sanctioned way of doing so - a lot of them weren't even using triangles, or were using a mix of techniques.
You are describing how to make a game look like the PS1 games, but the PS1 actually had a - somewhat flawed, but unique - GPU which kind of forced the limitations you outlined here, and forced a singular way of rendering.
That wasn't really true with Quake or Duke3D or the PC in general. You just drew to the screen with whatever technique you chose, which resulted in a unique look for each game.
There's no single oldschool look, as people writing software renderers didn't have a sanctioned way of doing so - a lot of them weren't even using triangles, or were using a mix of techniques.
You are describing how to make a game look like the PS1 games, but the PS1 actually had a - somewhat flawed, but unique - GPU which kind of forced the limitations you outlined here, and forced a singular way of rendering.
That wasn't really true with Quake or Duke3D or the PC in general. You just drew to the screen with whatever technique you chose, which resulted in a unique look for each game.