There are no lights in this scene, just Global Illumination or Radiosity. I used Sub-Polygonal Displacement for the bed sheet. The scene has only 106654 polygons.
The render took 51 hours in Cinema 4D. I worked with an Athlon XP 1800+ that had 1 GB of RAM.
There is minimal post-processing of the image.
Download the 3D objects (ZIP file, 1.5 mb)