features implemented

• primitives
  basic geometric shapes
  subdivision surfaces
  CSG
  
  
• lightsources
  point, area and volume lightsources
  
  
• shaders
  procedural shaders
  bitmaps
  
  
• self-shadowing volume shaders
  
  
• realistic camera model
  focal distance
  aperture (DOF)
  shutter speed (motion blur)
  
  
• global illumination
  sampled ambient lighting
  
  
• system
  multi-threaded