Adam Sampson's level-design bookmarkshttps://bookmarks.offog.org/ats/level-designAdam Sampson2017-10-07T13:18:05ZThe Doom Wiki at DoomWiki.org - Doom, Heretic, Hexen, Strife, and morehttps://bookmarks.offog.org/edit?url=https%3A%2F%2Fdoomwiki.org%2Fwiki%2FEntryway2017-10-07T13:18:05ZExactly what you would expect for the title. Most of the content is about particular (fan-made) levels, but there's good stuff on the technology here too.