C.H.Z. stands for “Continuously Habitable Zones,” an astrobiological term used for planets offering viable conditions for life to grow. Recent scientific studies have shown that life would be more likely to develop on a planet with two or more small suns (dwarf suns) rather than on a planet with one very bright sun. In such zones the saturated photosynthesis would produce black vegetation. For this film, Parreno collaborated with landscape architect Bas Smets to design the set, an extraterrestrial landscape near Porto, Portugal, that continues to grow to this day. Merging science and fiction, the landscape is practically void of light, presenting a disorientating black environment. The landscape is both alien and familiar - unclear as to whether this is a new inhospitable planet or the aftermath of some catastrophic event on Earth. Alongside the film, Parreno created a series of intricate, detailed ink drawings.