Why not? The original Doom didn't use a GPU renderer. It should be possible to d...

1313ed01 · 2025-10-22T07:17:32 1761117452

Even Quake launched with software rendering. Not sure if the first release even had support for any hardware acceleration?

flohofwoe · 2025-10-22T08:29:55 1761121795

IIRC GLQuake was more like an experiment, only Quake II had proper GL support from the start.

sfn42 · 2025-10-22T08:04:00 1761120240

The original doom wasn't even proper 3d. It was a sort of 2,5d.

And sure you can do 3d rendering on modern CPUs. It's just better on GPUs. Like thousands of times better.

alxmdev · 2025-10-22T16:09:24 1761149364

Someone always points out how Doom wasn't "real 3D" like it's some sort of gotcha. Games are smoke and mirrors, it's all a 2D grid of pixels at the end.

sfn42 · 2025-10-22T17:53:27 1761155607

Well yeah, a 2d grid of pixels also describes the result of rendering a 2d game. It matters how you arrive at that 2d grid of pixels, that's why you can't render Crysis on just a CPU. At least not in real time.

Flamingoat · 2025-10-22T09:40:07 1761126007

The main limitation of the engine is you couldn't have room over room. There is definitely three dimensions when playing the game.