DirectionalLight { 
    exposedField SFFloat ambientIntensity  0        # [0,1]
    exposedField SFColor color             1 1 1    # [0,1]
    exposedField SFVec3f direction         0 0 -1   # (-,)
    exposedField SFFloat intensity         1        # [0,1]
    exposedField SFBool  on                TRUE 
  }
  

slide: DirectionalLight