1. A method for mapping an object, comprising: illuminating the object with at least two beams of radiation having different beam characteristics; capturing at least one image of the object under illumination with each of the at least two beams; processing the at least one image to detect local differences in an intensity of the illumination cast on the object by the at least two beams; and analyzing the local differences in order to generate a three-dimensional (3D) map of the object.