

One of the earliest source ports was Boom. That’s about as far as you can go with the vanilla engine. Later, creative modders discovered the “ self-referencing sector” trick, which creates the illusion that you’re standing below the floor. Historically, like I’ve been doing, liquids have just been floor textures. It’s time to annihilate all of those restrictions.

But, this, all of this, is very much ZDoom only. 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. It also finally, utterly, breaks compatibility with vanilla Doom. I’ve saved this for last because it’s more complicated than anything else, by far. The only tool we’ve found so far that can get around those restrictions is the sky hack, and even that’s fairly limited. All the way we’ve had to deal with Doom’s limitations.

Tens of thousands of words later, you’ve watched me build a little world, and hopefully tried building your own.
