A plant lives in two places at once — the air around its leaves and the zone around its roots. This Studio authors both. You set the levers you can control (temperatures, humidity, CO₂, airflow, moisture); the Studio computes what falls out of them and lines every value up against the band your crop wants at this stage.

• VPD is not an input — it's a result. Vapor Pressure Deficit comes out of temperature and humidity together. Two rooms at the same humidity but different temperatures have different VPDs and grow differently. The Studio computes day and night VPD from your temps and humidity, then checks them against the crop's VPD band.
• Dew point is your floor. Surfaces colder than the night dew point condense water — wet leaves invite disease. The Studio flags a night setpoint that runs too close to its dew point.
• DIF (day − night temp) is a morphology lever. A warmer day than night (positive DIF) tends toward stretch; a cooler day (negative DIF) holds plants compact without chemicals.
• The bands are typical CEA targets, not gospel. Cultivars tolerate a window; the band orients you. The four-band thresholds (warning / critical, each side) are the same numbers a controller would use as setpoint and alarm — so the recipe you print today is the program a controller runs tomorrow.

Control some, monitor all. In a sealed room most of these are controllable; in a greenhouse or field, some are only monitorable and the weather sets them. Either way, every property here is worth watching — what you can't control, you can still observe and learn from.