Cant you put them directly in the root directory textures folder?
Or have you got other mods to work with your way? Maybe that command isnt working??
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Nice stumps btw.. Im bout to fall asleep but Ill make some 3mobile ones and try a few ways of getting them in-game!
In the root directory of the game, there's a .zip archive called dbc14_textures but I don't think the game actually reads from this at all and it's contents are purely to use for modding. I did try replacing stuff in there too but it didn't do anything.
I haven't got anything I've modded to work yet, although I have only tried to edit the ball sponsor and stumps as I don't think anyone else has tried to do anything to these and I haven't touched stuff like kits/bats or downloaded any either.
I think the actual textures are inside the "data-0.blobset.pc" file in the game's root directory but I don't think we can edit it's contents yet so the documents directory seems to be the way to do things at the minute. Ross may not want the modding to be based on editing the game's core files in it's root directory because I think there's a plan in place to make mods placed in the documents directory not work for pirates (saw some sort of 'Safe Mode, using default textures' prompt).
In Football Manager for example, the vast majority of graphical mods go into the documents directory and you can have a pretty much unlimited amount of stuff added to the game, like hundreds of thousands of player faces, kits, emblems etc and link them to ingame IDs. I hope we don't have to make do with a limited number of 'slots' for graphical content in DBC.
Edit - Downloaded a HUD logopack from the mod screenshots thread, placed it in the documents directory and it applied correctly in the game, so I am putting things in the right places. Not sure why the balls/stumps won't work.