Textures are hidden in papa files, the format of which was unknown until a few days ago. But now it's known, so I started building a papa editor. Version 0.4.1 is up on GitHub. Binaries are available for Linux, Mac and Windows. Use File -> Open to open a directory containing textures. You can export whatever texture is displayed through File -> Export. A whole slew of image formats are supported thanks to Qt4, but you will probably want to save as PNG, since that has transparency support. The import menu item only works for A8R8G8B8 (i.e. skyboxes) and X8R8G8B8 (some particle effects). DXT1 editing works too, but is highly experimental. Version 0.1: Initial release Version 0.2: Lots of polishing Version 0.3: Bugfix for A8R8G8B8 and X8R8G8B8 and minimaps. This may have caused edge effect with skyboxes. Also, the last export directory wasn't saved properly. Version 0.3.1: Bugfix for DXT1 and DXT5. Colour channels were switched apparenty. Thanks for @WwAiRtRhIiOnR for pointing that out. Version 0.3.2: Attempt at fix DLL error on Windows. Version 0.4: Fix for crashing on (32-bit?) Windows when loading DXT5 textures. Also you can now supply a directory from the command-line. Thanks to @deltablu26 for finding that one. Version 0.4.1: Fix for a bug introduced by the previous bugfix. DXT5 textures were being corrupted.