7.1.2 The Interior Statement

From [pov:6.6]:

INTERIOR:
    interior { [INTERIOR_IDENTIFIER] [INTERIOR_ITEMS...] }
INTERIOR_ITEM:
    ior Value | caustics Value | dispersion Value | 
    dispersion_samples Samples | fade_distance Distance | 
    fade_power Power | fade_color <Color>
    MEDIA...

Interior default values:

ior                : 1.0
caustics           : 0.0
dispersion         : 1.0
dispersion_samples : 7
fade_distance      : 0.0 
fade_power         : 0.0
fade_color         : <0,0,0>