### 3.7.8 glass.inc, glass_old.inc

This file contains glass materials using new features introduced in POV 3.1 and 3.5. The old glass.inc file is still included for backwards compatibility (it is named glass_old.inc, and is included by glass.inc, so you do not need to change any scenes), but these materials will give more realistic results.

#### 3.7.8.1 Glass colors (with transparency)

`Col_Glass_Beerbottle Col_Glass_Bluish Col_Glass_Clear Col_Glass_Dark_Green` | `Col_Glass_General Col_Glass_Green Col_Glass_Old Col_Glass_Orange` | `Col_Glass_Ruby Col_Glass_Vicksbottle Col_Glass_Winebottle Col_Glass_Yellow`

#### 3.7.8.2 Glass colors (without transparency, for fade_color)

`Col_Amber_01 Col_Amber_02 Col_Amber_03 Col_Amber_04 Col_Amber_05` | `Col_Amber_06 Col_Amber_07 Col_Amber_08 Col_Amber_09 Col_Amethyst_01` | `Col_Amethyst_02 Col_Amethyst_03 Col_Amethyst_04 Col_Amethyst_05 Col_Amethyst_06`
`Col_Apatite_01 Col_Apatite_02 Col_Apatite_03 Col_Apatite_04 Col_Apatite_05` | `Col_Aquamarine_01 Col_Aquamarine_02 Col_Aquamarine_03 Col_Aquamarine_04 Col_Aquamarine_05` | `Col_Aquamarine_06 Col_Azurite_01 Col_Azurite_02 Col_Azurite_03 Col_Azurite_04`
`Col_Beerbottle Col_Blue_01 Col_Blue_02 Col_Blue_03 Col_Blue_04` | `Col_Citrine_01 Col_Dark_Green Col_Emerald_01 Col_Emerald_02 Col_Emerald_03` | `Col_Emerald_04 Col_Emerald_05 Col_Emerald_06 Col_Emerald_07 Col_Fluorite_01`
`Col_Fluorite_02 Col_Fluorite_03 Col_Fluorite_04 Col_Fluorite_05 Col_Fluorite_06` | `Col_Fluorite_07 Col_Fluorite_08 Col_Fluorite_09 Col_Green Col_Green_01` | `Col_Green_02 Col_Green_03 Col_Green_04 Col_Gypsum_01 Col_Gypsum_02`
`Col_Gypsum_03 Col_Gypsum_04 Col_Gypsum_05 Col_Gypsum_06 Col_Orange` | `Col_Red_01 Col_Red_02 Col_Red_03 Col_Red_04 Col_Ruby` | `Col_Ruby_01 Col_Ruby_02 Col_Ruby_03 Col_Ruby_04 Col_Ruby_05`
`Col_Sapphire_01 Col_Sapphire_02 Col_Sapphire_03 Col_Topaz_01 Col_Topaz_02` | `Col_Topaz_03 Col_Tourmaline_01 Col_Tourmaline_02 Col_Tourmaline_03 Col_Tourmaline_04` | `Col_Tourmaline_05 Col_Tourmaline_06 Col_Vicksbottle Col_Winebottle Col_Yellow`
`Col_Yellow_01 Col_Yellow_02 Col_Yellow_03 Col_Yellow_04` |  |

#### 3.7.8.3 Glass finishes

`F_Glass5, ..., F_Glass10`

#### 3.7.8.4 Glass interiors

`I_Glass1, ..., I_Glass4`
  `I_Glass_Fade_Sqr1` (identical to `I_Glass1`)
  `I_Glass_Fade_Exp1` (identical to `I_Glass2`)
  `I_Glass_Fade_Exp2` (identical to `I_Glass3`)
  `I_Glass_Fade_Exp3` (identical to `I_Glass4`)
  Glass interiors with various fade_power settings.
`I_Glass_Dispersion1, I_Glass_Dispersion2`
  Glass interiors with dispersion. `I_Glass_Dispersion1` has an approximately natural glass dispersion. `I_Glass_Dispersion2` is exaggerated.
`I_Glass_Caustics1, I_Glass_Caustics2`
  Glass interiors with caustics.

#### 3.7.8.5 Glass interior macros

`I_Glass_Exp(Distance)` and `I_Glass_Sqr(Distance)`.
These macros return an interior with either exponential or fade_power 2 falloff, and a fade_distance of Distance.

#### 3.7.8.6 glass_old.inc

This file contains glass textures for POV-Ray versions 3.1 and earlier. These textures do not take advantage of the new features introduced with POV-Ray 3.5 and are included for backwards compatability, you will get better results with the materials in glass.inc.

These textures are designed to be used with the I_Glass interior, also defined in this file.

##### 3.7.8.6.1 Glass finishes

`F_Glass1, ..., F_Glass4`

##### 3.7.8.6.2 Glass textures

`T_Glass1`
  Simple clear glass.
`T_Glass2`
  More like an acrylic plastic.
`T_Glass3`
  An excellent lead crystal glass.
`T_Glass4`
`T_Old_Glass`
`T_Winebottle_Glass`
`T_Beerbottle_Glass`
`T_Ruby_Glass`
`T_Green_Glass`
`T_Dark_Green_Glass`
`T_Yellow_Glass`
`T_Orange_Glass`
  Orange/amber glass.
`T_Vicksbottle_Glass`