About old wads inside in slade

[doomkr]

I noticed I saw in old wads when I look inside them with slade I see custom textures have entries "pp_" and something called "_deutex_" 

What Is that and why have that inside wad?

Edited October 30, 2019 by doomkr

[Gez]

PP_ markers are for patches. They're not strictly speaking necessary.

 

_DEUTEX_ is the "signature" left by the DeuTex program.

 

You may also find, sometimes, the TAGDESC or PLATFORM lumps; those are from the unofficial DoomEd.

 

[doomkr]

But me when I add new textures, just appear me "p_" not double pp. Is curiosity.

[Gez]

The doubled initials for patches, sprites, and flats (FF_, PP_, SS_) was a convention used back in the days because of limitations in the vanilla engine. It allowed to separate the mod-added data in neat little categories, allowing then programs like DeuSF or NWT to combine the PWAD with the IWAD, because that was often necessary (though for sprites there's a workaround involving DeHackEd, and for flats you can make do with just one F_END lump, and for patches, again, it's actually not needed since the vanilla engine doesn't actually use a namespace for them).

[doomkr]

In nutshell, currently is not needed put duplicated initials.