Linedef type 102, Solid, Translucent, is a basic type of floor over floor block which is translucent. It is often used to create windows. The GLASSTEX and GLASS3 textures are good for this purpose.
Setup
The flats, floor height, and ceiling height of the FOF are determined by the flats, floor height, and ceiling height of the control sector, and the sidedefs of the FOF's walls are determined by the sidedef of the control linedef.
The alpha value of this FOF's translucency can be changed by setting the control linedef's front side upper texture to the number symbol (#), followed by a three-digit decimal number, from 000 to 255. #000 is completely invisible, whereas #255 is completely opaque. Note that in the Software renderer, there are actually only eleven different values: #000–#011, #012–#037, #038–#063, #064–#088, #089–#114, #115–#139, #140–#165, #166–#191, #192–#216, #217–#242, and #243–#255, where #000–#011 is invisible, and #243–#255 is opaque. The advantage of using the completely opaque values is the ability to properly render flats which use transparent pixels. If no value is set in the front side upper texture, however, the default alpha value of #128 will be used.
If Flag [6] / Not Climbable is checked, the inside of the FOF will be rendered as well.
Linedef special info
Floor height
Height of bottom of FOF
Ceiling height
Height of top of FOF
Front upper texture
Alpha value of FOF's translucency, from #000 to #255 (#000 is completely invisible, #255 is completely opaque, #128 is default)
