1. A method implemented by at least one computer processor, the method comprising: determining by the at least one computer processor, a set of directional incidence light sources with respect to a given point of a lighting environment, the directional incidence light sources associated with respective intensities; generating by the at least one computer processor, an image of the object situated at the given point in the lighting environment from a particular viewing direction by applying a bi-directional reflection distribution function of the object on the intensities of the directional incidence light sources; and outputting the generated image.