This project is about designing a pedestrian-friendly mixed-used transit hub in Hudson Yards by providing good daylight conditions using BIM. To achieve this, we made three openings on the ground floor to allow the sunlight to reach the underground floor that has train platforms and transit circulation. We tested solar fans in different rush hours in Grasshopper with a Ladybug plugin and carved out the building mass which is designed based on the Hudson Yards district zoning regulations. Facades are designed to maximize the sunlight reflection to redirect it to the underground railway platform. We angled the reflective curtain wall by calculating the average angle between the sunlight vector and intended reflected light vector.