3D is not "real". The output of 3D apps are projected onto a 2D screen (VR goggles not withstanding, but even then, there are simply two outputs projected onto two 2D screens).

Wolfenstein has rasterization, just like a "real" 3D engine does. Its engine happens to be optimized for certain viewpoints, which makes it "2.5D", but it still gives a crude approximation of 3D, just like every other "3D" game.

"which makes it "2.5D""

You wasted all those words to say what I said... it's not 3D. :)

PS: I know very well how 3D games work since I co-wrote a commercial 3D engine in 2002-3 and used to teach computer graphics course at a university.

I think your comment underestimates developments in 3d hardware and software in the last 15 years or so.

Woosh

Why? What I said and what you said are unrelated.

This particular version of Wolfenstein 3D is actually rendered using standard 3D techniques in OpenGL. It's just low on detail and the ability to look up/down.