After few years of inactive in mapping i came back, but have some problems with texturing.
I think, that i remember almost nothing about special textures
For example - what is for -1 texture? Like this (its from de_train's wad file): Or this one for example - why is half-size texture with added letter: Or example 3 - those black textures only with windows in color: are they for add glowing effect or what?
Please help me to solve those problems