I drew bread as a loaf from an isometric perspective. It didn't get it. All but one of the other pictures were of a single slice of bread. There was another picture of a loaf of bread, but it was mirrored in relation to mine. Seems like some bit of knowledge should be devoted to whether orientation is important, but the computer doesn't understand that. It seems like this is because most people draw pictures one way initially. It might be helpful to have each person draw a second picture of the same thing.