1. A method of performing a biometric function, the method comprising: illuminating a skin site of an individual; receiving light scattered from the skin site under multispectral conditions, the light including light scattered from tissue beneath a surface of the skin site; deriving a plurality of biometric modalities from the received light, wherein at least two of the biometric modalities represent different portions of the skin site; fusing the plurality of biometric modalities into a combined biometric modality; and analyzing the combined biometric modality to perform the biometric function.