Method for controlling deployment of an airbag into a passenger compartment of a vehicle including detecting a position of an occupant whose forward-facing surface will be the surface which interacts with the airbag upon its deployment, determining a desired amount of gas within the airbag during inflation of the airbag based at least in part on the detected position of the occupant, and adjusting the amount of gas within the airbag during inflation of the airbag to provide the airbag with the desired amount of gas during its inflation. Adjustment of the amount of gas within the airbag may entail varying the amount of gas being directed into the airbag based on the morphology of the occupant (inflow control) and/or controlling the outflow of gas from the airbag based on the morphology of the occupant (outflow control).