I wanted to put the nude textures directly into the game files so there would be no need to use uMod, so I searched for the all skin files and using this ruby script.
Ruby scripts for modding/removing the censors • /r/senrankagura
Unfortunately, the game files are smaller in resolution (1024x1024 as opposed to 2048x2048), but do have a better quality than the files provided in this thread.
Since I have literally 0 Photoshop skills (I ain't even have a copy of it anyway), I would like to ask OP to create a new set of textures based on the extracted one. I would then repack them into the game files.
Unfortunately it does not support files with larger resolution, so you are stuck at 1024x1024 resolutions. Dunno if it is a limitation by the game itself or the extraction/repack script.
I deleted all duplicate textures with the same CRC32 and changed the filenames to fit for the characternames.
https://dl.dropboxusercontent.com/u/15200460/Stuff/SKSV Body Textures.rar
Edit: Tried to put the files provided by OP into the gamefiles anyway.
As mentioned above, I had to downsize the files to 1024x1024 (half the original resolution) and tried to replace with the right texture.
Currently supported:
Asuka
Ikaruga
Katsuragi
Yagyu
Hibari
Homura
Yomi
Haruka
Yumi
Murakumo
Yozakura
Shiki
Minori
Miyabi
Murasaki
Imu
Ryobi
Ryona
Suzune/Rin
Not supported:
Hikage
Mirai
Daidoji
https://dl.dropboxusercontent.com/u/15200460/Stuff/SKSV Nude Textures.rar
Just extract all files into "model\player" folder. I recommend to create backups first thought.
Edit2:
Forgot to add the modified pictures such as the new title screen and character pictures...
https://dl.dropboxusercontent.com/u/15200460/Stuff/SKSV Nipple Exists.rar
They ought to be extracted into the "2D" folder. Unfortunately, two of the pictures I couldn't include since their file format is different and thus I cannot repack them.