Materials and their reasonable values:

Material:
	parameter 1
	(open:closed]
	interpretation

	parameter 2
	[closed:approximate>
	interpretation

Light:
	color
	(0:inf),(0:inf),(0:inf)
	output brightness

Glow:
	color		
	(0:inf),(0:inf),(0:inf)
	output brightness

	maximum radius
	[0:inf)
	no shadows - always shadows

Spotlight:
	color		
	(0:inf),(0:inf),(0:inf)
	output brightness

	maximum angle
	[0:360]
	no shadows - always shadows

	direction
	any
	aimed orientation

Mirror:
	color
	[0:1],[0:1],[0:1]
	black - silver

Plastic:
	color
	[0:1],[0:1],[0:1]
	black - white

	specularity
	[0:.07>
	matte - satin

	roughness
	[0:.2>
	polished - low gloss

Metal:
	color
	[0:1],[0:1],[0:1]
	0-100% reflectance

	specularity
	<.5:1]
	dirty - clean

	roughness
	[0:.5>
	polished - roughened

Trans:
	color
	[0:1],[0:1],[0:1]
	black - white

	specularity
	[0:.07>
	matte - satin

	roughness
	[0:.2>
	polished - low gloss

	transmission
	[0:1]
	opaque - transparent

	transmitted specularity
	[0:1]
	diffuse - clear

Dielectric:
	transmission
	[0:1],[0:1],[0:1]
	black - transparent

	refractive index
	(1:2>
	vacuum - diamond

	Hartmann's constant
	<-20:30>
	negative dispersion - positive dispersion

Interface:
	interior transmission
	[0:1],[0:1],[0:1]
	black - transparent

	interior refractive index
	(1:2>
	vacuum - diamond

	exterior transmission
	[0:1],[0:1],[0:1]
	black - transparent

	exterior refractive index
	(1:2>
	vacuum - diamond

Glass:
	transmission
	[0:1],[0:1],[0:1]
	black - transparent

Mist:
	extinction (interaction density in fraction/distance)
	[0:inf),[0:inf),[0:inf)
	transparent - solid

	albedo (particle reflectivity)
	[0:1],[0:1],[0:1]
	black - white

	Heyney-Greeenstein scattering parameter
	[0:1)
	isotropic - pure forward scattering