An apparatus is provided for regulating conditions in a vehicle cabin associated with a roof including an opening. A sunroof selectively covers the opening to the vehicle cabin. A blind is adapted for moving from a stowed position within the roof to a deployed position spanning across the opening. The blind includes blades selectively movable for partially blocking light entry while permitting airflow to the passenger compartment in the deployed position of the blind. A plurality of blades may be provided for concurrent operation, and may be adjustable to control a direction of airflow through the opening when the sunroof is open.