10.1.9  Object Modifiers
  - Manipulate the appearance of an object
- OBJECT_MODIFIERS:
- [OBJECT_PHOTONS] & [CLIPPED_BY] & [BOUNDED_BY] & [MATERIAL] & [INTERIOR] & [INTERIOR_TEXTURE] &
       [TEXTURE] & [PIGMENT] & [NORMAL] & [FINISH] & [TRANSFORMATION...] & [no_shadow] &
       [no_image[BOOL]] & [no_reflection{BOOL]] & [inverse] & [double_illuminate[BOOL]] & [hollow [BOOL]]
- Specify how an object should interact with photons:
- OBJECT_PHOTONS:
- Jump to SDL
- photons { OBJECT_PHOTON_ITEMS }
- OBJECT_PHOTON_ITEMS:
- [target [F_SPACING_MULT]] & [refraction BOOL] & [reflection BOOL] & [collect BOOL] & [pass_through [BOOL]]
- Slice a portion of a shape:
- CLIPPED_BY:
- clipped_by { UNTEXTURED_SOLID_OBJECT... } |
 clipped_by { bounded_by }
- UNTEXTURED_SOLID_OBJECT:
- FINITE_SOLID_OBJECT | INFINITE_SOLID_OBJECT
- Note, neither with a texture applied.
- Specify a bounding shape for an object:
- BOUNDED_BY:
- bounded_by { UNTEXTURED_SOLID_OBJECT... } |
 bounded_by { clipped_by }
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10.1.9.2  Material
- Group together surface textures and interior properties:
- MATERIAL:
- material { [MATERIAL_IDENTIFIER] [MATERIAL_ITEM ...] }
- MATERIAL_ITEMS:
- TEXTURE | INTERIOR_TEXTURE | INTERIOR | TRANSFORMATION
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10.1.9.3  Interior
- Describe the interior of an object:
- INTERIOR:
- Jump to SDL
- interior { [INTERIOR_IDENTIFIER] [INTERIOR_ITEMS] }
- INTERIOR_ITEMS:
- [ior FLOAT] & [dispersion FLOAT] & [dispersion_samples INT] & [caustics FLOAT] &
       [fade_distance FLOAT] & [fade_power FLOAT] & [fade_color COLOR] & [MEDIA...]
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