Use a generic texture utility
To convert an entire mod’s textures: RTTexConverter.exe -i "C:\Mods\MyMod\Textures" -o "C:\PNG_Export" -r -f png
Before you can convert a file, you need to understand what you’re dealing with. RTTEX stands for . It is a proprietary container format primarily associated with the GIANTS Engine 8, 9, and 10 , the engine behind the Farming Simulator series (as well as Professional Farmer and other simulation titles).