Tens of thousands of words later, you’ve watched me build a little world, and hopefully tried building your own. All the way we’ve had to deal with Doom’s limitations. Flat surfaces. No room over room. The world can only move vertically. The only tool we’ve found so far that can get around those restrictions is the sky hack, and even that’s fairly limited.
I’ve saved this for last because it’s more complicated than anything else, by far. It also finally, utterly, breaks compatibility with vanilla Doom. You could apply everything I’ve said so far to vanilla with some tweaking — use line types instead of specials, make a Doom-format map, skip the separate light levels and other tricks. But, this, all of this, is very much ZDoom only.
Finally, the time has come.
It’s time to annihilate all of those restrictions.
Mostly.