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  1. Materials and their reasonable values:
  2.  
  3. Material:
  4.     parameter 1
  5.     (open:closed]
  6.     interpretation
  7.  
  8.     parameter 2
  9.     [closed:approximate>
  10.     interpretation
  11.  
  12. Light:
  13.     color
  14.     (0:inf),(0:inf),(0:inf)
  15.     output brightness
  16.  
  17. Glow:
  18.     color        
  19.     (0:inf),(0:inf),(0:inf)
  20.     output brightness
  21.  
  22.     maximum radius
  23.     [0:inf)
  24.     no shadows - always shadows
  25.  
  26. Spotlight:
  27.     color        
  28.     (0:inf),(0:inf),(0:inf)
  29.     output brightness
  30.  
  31.     maximum angle
  32.     [0:360]
  33.     no shadows - always shadows
  34.  
  35.     direction
  36.     any
  37.     aimed orientation
  38.  
  39. Mirror:
  40.     color
  41.     [0:1],[0:1],[0:1]
  42.     black - silver
  43.  
  44. Plastic:
  45.     color
  46.     [0:1],[0:1],[0:1]
  47.     black - white
  48.  
  49.     specularity
  50.     [0:.07>
  51.     matte - satin
  52.  
  53.     roughness
  54.     [0:.2>
  55.     polished - low gloss
  56.  
  57. Metal:
  58.     color
  59.     [0:1],[0:1],[0:1]
  60.     0-100% reflectance
  61.  
  62.     specularity
  63.     <.5:1]
  64.     dirty - clean
  65.  
  66.     roughness
  67.     [0:.5>
  68.     polished - roughened
  69.  
  70. Trans:
  71.     color
  72.     [0:1],[0:1],[0:1]
  73.     black - white
  74.  
  75.     specularity
  76.     [0:.07>
  77.     matte - satin
  78.  
  79.     roughness
  80.     [0:.2>
  81.     polished - low gloss
  82.  
  83.     transmission
  84.     [0:1]
  85.     opaque - transparent
  86.  
  87.     transmitted specularity
  88.     [0:1]
  89.     diffuse - clear
  90.  
  91. Dielectric:
  92.     transmission
  93.     [0:1],[0:1],[0:1]
  94.     black - transparent
  95.  
  96.     refractive index
  97.     (1:2>
  98.     vacuum - diamond
  99.  
  100.     Hartmann's constant
  101.     <-20:30>
  102.     negative dispersion - positive dispersion
  103.  
  104. Interface:
  105.     interior transmission
  106.     [0:1],[0:1],[0:1]
  107.     black - transparent
  108.  
  109.     interior refractive index
  110.     (1:2>
  111.     vacuum - diamond
  112.  
  113.     exterior transmission
  114.     [0:1],[0:1],[0:1]
  115.     black - transparent
  116.  
  117.     exterior refractive index
  118.     (1:2>
  119.     vacuum - diamond
  120.  
  121. Glass:
  122.     transmission
  123.     [0:1],[0:1],[0:1]
  124.     black - transparent
  125.  
  126.