Adding a fourth texture to the upl script?
What do you have to write in the UPL file?
There's the head texture, the body texture, the portrait texture, ad then what for your fourth texture?
Which fourth texture are you refering too?
From what i have learned and come to know atleast in ut2003 there was the following. Not sure if something changed though for ut2004.
I'm adding a small third texture for some alpha clipping, and surely I have to menton it in the UPL file or it won't show up in the game?
As far as I know, any additional textures have to be hardcoded into the model file - the upl handler won't know what to do with them.
This doesn't restrict you to only ever having one skin for that part - you can build some scripting into the model so that the skin used is related by name to one of the main skins - but I don't know precisely how that is achieved.
Best place to ask for details is on the Polycount forums, all the UT2003 models I know of which used this technique were done by people who post on there, and there might even be a FAQ or sticky on it.