Oh, I thought it only did that when you tried to open a wad. Oh well, I'll post what it says instead (edited a bit by me):
Tutorial on Texture: Theory
What is a Texture?
Countrary to the common belief, a wall texture is not a picture. It is only a list of wall patches, which are the actual graphic images. Sometime, this list is composed of only one wall patch, so you could confuse texture and patch.
A texture is composed by placing wall patches one after the other in specific position, with the later ones sitting on top of the earlier ones.
This 2-level approach can provide considerable economy of memory and disk space, since the same level patch can be used in more than one texture. A typical example is the EXIT patch, that appears in lots of different textures, at the exit of levels (editor's note: umh, this is bollocks, EXIT only appears in one texture (two in Doom 1). The switch patches, such as SW1S0, would be much better examples)
The different textures lists
The list of textures is usually stored in an entry called TEXTURE1.
When editing TEXTURE1, you will see that list of textures, with names and size of the textures.
Coming with the list of textures, you can find a list of patches, PNAMES. You should not bother about this list, since most (all?) editors handle it automatically, but you must know that it must be present, if you have added new patches.
With DOOM 1 and HERETIC, there is another list of textures, called TEXTURE2. This list contains textures that are only in the registered version of the game.
Edit: Hmm, I just noticed that there's an on-line Help thingy for Deepsea. This page should help you:
RTC-3057: The future of DOOM.
3057 reasons to keep dooming.
Paradox: The gateways have re-opened. But this time it isn't hellspawn who've come through...
Last edited by NiGHTMARE on 12-27-02 at 15:01