interior
// describes inside of a shape (similar to texture, but for inside, not surface)
interior {
ior 1.31 // index of refraction
dispersion // needs a color_map in the light source
dispersion_samples 7 // accuracy of calculation (2..100) [7]
caustics 1.0 // faked caustics (0..1)
fade_power 1001 // values larger than 1000 give realistic exponential attenuation
fade_distance 3 // distance where light reaches half intensity
fade_color <0, .3, 0> // color for fading
media {..media items..}
}