In contrast to the other panels in the register, Adam and Eve are positioned near the edge of each panel, and neither is entirely "within" the border of their setting. Adam's foot appears to protrude out of the niche and frame and into real space. More subtly, Eve's arm, shoulder and hip appear to extend beyond her architectural setting. These elements give the panel a three-dimensional aspect. The trompe-l'œil become more pronounced when the wings are turned slightly inwards, an especially interesting fact when it is considered that the polyptych was wider than the original chapel it was executed for and could never be opened fully.