text: #define DEFAULT_METALLIC   0.30f
  
  //#define DEFAULT_SPEC_INT   0.50f
  #define DEFAULT_SPEC_INT   0.25f
  //#define DEFAULT_GLOSSINESS 0.08f
  #define DEFAULT_GLOSSINESS 0.02f
  #define DEFAULT_NM_INT     0.5f
  
  #define DEFAULT_SPEC_VALUE 0.0f
  // Default material: a bit plasticky; but not completely plastic:
  // This value should be DEFAULT_METALLIC / 2.0
  #define DEFAULT_MAT		  (DEFAULT_METALLIC * 0.5f)
  
  // Material values
  // The first channel of SSAOMask is the material. In this channel we have:
  // Plastic-Metallicity in the range 0.0..0.5
  // Glass: 0.6
  // Shadeless: 0.75
  // Emission: 1.0
  #define PLASTIC_MAT		0.00
  #define METAL_MAT		0.50
  #define GLASS_MAT		0.60
  #define SHADELESS_MAT	0.75
  #define EMISSION_MAT	1.00
  
  
  // Material limits
  #define PLASTIC_LO		0.000
  #define PLASTIC_HI		0.250
  
  #define METAL_LO		0.250
  #define METAL_HI		0.550
  
  #define GLASS_LO		0.550
  #define GLASS_HI		0.625
  
  #define SHADELESS_LO	0.625
  #define SHADELESS_HI	0.875
  
  #define EMISSION_LO		0.875
  #define EMISSION_HI		1.000
  