Chamber function now functions too, as you can see on the picture to the right. The chamber with the master brain is filled with a green sludge, while all other chambers are flagged as hallways.
There is a lot we can improve here, like balancing the number of flayers, slowing and animating the impregnation (flotch! blood, wheee!), adding some crawling vulnerable Larvae in the chamber, etc, but lets keep that for later and focus on adding some more things to do.