You need to install https://www.moddb.com/mods/jedi-knight-remastered/downloads/jedi-knight-remastered-30

unpack in C:\Users\yourusername\AppData\Roaming\OpenJKDF2\openjkdf2\jkgm\materials\jknup

**V1.0 features over 90 additional textures+fixes**

Fix for two of the textures. unpack and overwrite the existing textures.
(The platform texture still isn't tiling 100%, can't fix this unfortunately because it tiles perfectly in photoshop (using offset to check how it tiles)
Edit: small fix again