Given a scene G, the random vector W=(wi)1≤i≤n is embedded into G by
wrapping each atomic wi by a graphical object: let denote it ωi, then we obtain a vector of objects Ω=(ωi)1≤i≤n.
inserting Ω into G so that every ωi contributes to the rendered image, namely they distort this image. The distortion is kept to be lower than the human perception of light [10], [11].