These are a FEW of the areas you need to pay attention
to. Note the plethora of contact shadows. This just underscores the fact that
contact shadows are necessary and EVERYWHERE! Just as in nature, everything has
shadows, everything has contact shadows, dark and light areas exist, and
highlights make things more noticeable. The trick is making them appear in your
scene. Pay close attention to what's going on near edges and across large flat
surfaces, for example, the drawers on the dressers and the footboard of the bed.
What is causing these variations in color?