The ramp disgorged us into a large, square chamber about fifteen meters on a side. Floors, walls, and five-meter-high ceiling were the same slightly resilient beige-colored material as the ramp. The light was even more reddish, coming from translucent hemispheres, about thirty centimeters in diameter, set into the walls at about knee level. They reminded me disgustingly of glowing blood-blisters, and the low-angled light cast our shadows-elongated, warped, and horrible-up onto the walls and ceilings. The biological smell-yeast, that's what it reminded me of-was even stronger now.