My friend has this oil painting of a water vase and three yellow apples in front of a wooden barn. When the sun hits from behind you can see a woman's face in the vase and a young boys face in the vase. It is an ordinary picture without having light shine on it..When light hits it from behind it shows these hidden faces. Very interesting piece. We could find no signatures. Would anyone be able to help ID the artist or name of the piece. Thank you.