[anthk]

Modern source ports are a totally different thing. If any, try to do what the former comment states with a Boom compatible engine as Crispy Doom or Chocolate Doom.

[jalbertoni]

You're confusing things a bit here, Boom is already an enhanced port and it got the kind of line-to-line teleport that allows you to do this.

Crispy and Chocolate Doom are what the community calls "vanilla" Doom, with no enhancements at all.

That said, if you are willing to hex-edit the map data, you can have non-euclidean geometry in vanilla Doom: https://doomwiki.org/wiki/Linguortal

[anthk]

Crispy Doom will play most Boom compatible levels just fine. I tried it with some Megawads, and I had no issues, even with FreeDoom as the IWAD.

No, I'm not confused. To me, Boom it's pretty close to vanilla. Zdoom and the rest are pretty much another league, closer to Quake/HL than Doom.