Publisher's blurb: Dungeon Crawl Companion #4 covers a topic I find is under-discussed in RPGs, and that is the idea of lights and shadows in dark places like dungeons and caves. As well as the ceiling space that should exist inside of dungeons and the support beams that help keep the ceiling from collapsing. With some of the thoughts I express in this I hope to give some good ideas for players and judges who play DCC RPG so that they can ask questions about light sources, how to use them in combat, how to find or make shadows for characters to hide in, as well as places where characters can climb even inside of dungeon rooms to set ambushes or hide from monsters.