Light was comming from above and slightly inbetween me and the object. This can be noticed in the highlights on the towel on the top of the back of the chair and also on the part of the towel that is stretching from the left arm handle.
Most of the dents on the towel should be visible because of the dark shadows on the insides of the dents, but there are also areas with several very subtle creases like just after the towel bends over the arm handle.
I believe the shadows worked out nice because of the differeence that can be found in their sharpness. The shadow casted by the end of the towel that drops very low is farely hard compared to the shadows further back under the chair, where more light comes in because there are no objects too close around.
