An important goal of O+A's design for Slack's San Francisco office was that each floor convey a different part of the Pacific Crest Trail, a hiker's paradise that stretches from the Baja Desert to the Northwest Glaciers. Slack's founder Stewart Butterfield is an avid hiker, and it was his enthusiasm for the trail that inspired the design. O+A gave each floor of the office a distinct geographical identity, conveyed in finish and furniture selections, environmental graphics and most significantly, light. The lighting design for this project was perhaps the most dynamic we have ever attempted. Working with our lighting consultant Niteo and lighting engineer Decker Electric, our designers created individual tableaux drawn from different experiences in nature--the dappled light of a forest through a canopy of trees, the sheltered light behind a waterfall, pinpoints of light at night in the desert, the supernal glow that remains in the sky just after the sun goes down. Each of these effects was paired with a meeting, work or lounge space that "rhymed" with the nature of its wilderness inspiration. So, a "fairy ring" huddle where Slack staff can drop in to meet informally or work alone draws light from directly overhead as would be the case in a redwood fairy ring. A "starry night" lounge brings the focus and containment of a stage set to what could have been a conventional meeting area--stylizing an effect so many wanderers have noted about night in the desert.