Backlit cytochrome

Click picture for the big 1024x768 version

This one uses atmosphere again. The protein model was generated in SwissPDB and exported as a POV script. I substituted standard atom textures with sort of grained textures, based on a stone texture I found in the Moray texture libarary. I placed a spotlight pointed at the scene center at some distance behind the protein model. Another two pointlights were added, but the spotlight is the only one that interacts with the atmosphere. Atmospheric interaction can be turned off by including the 'atmosphere off' statement in the light definition. The atmosphere may require some trial and error to get working properly. Often, scenes appear way too dark or too light, depending on the atmosphere thickness (defined by the 'distance' and 'scatter' statements) and the number of lights interacting with the atmosphere. I found that atmosphere usually does not work very well with pointlights, since these emitt light isotropically.