textures.inc - Glass

### 7.18.4 textures.inc - Glass

`Glass_Finish` is a generic glass finish, `Glass_Interior` is a generic glass interior, it just adds an ior of 1.5.

Glass materials:

`M_Glass`
  Just glass.
`M_Glass2`
  Probably more of a "Plexiglas" than glass.
`M_Glass3`
  An excellent lead crystal glass!
`M_Green_Glass`

Glass textures contributed by Norm Bowler, of Richland WA. NBglass_finish is used by these materials.

`M_NBglass`
`M_NBoldglass`
`M_NBwinebottle`
`M_NBbeerbottle`

A few color variations on Norm's glass.

`M_Ruby_Glass`
`M_Dark_Green_Glass`
`M_Yellow_Glass`
`M_Orange_Glass`
`M_Vicks_Bottle_Glass`