Might there be a possibility that you have duplicate files? If there are any files in your Feral-heart>>media>>particles folder that end in _0,_1, ect, delete them.
You could also have a rendering system issue. If you want to change your rendering system, go into your Feral-heart folder and open the ogre.cfg file with Notepad. If your rendering subsystem is set to Direct3D9, then change it to OpenGL. (visc versa, depending on which system is set to your computer.)
If the first two lines look something like this:
Render System=Direct3D9 Rendering Subsystem
[Direct3D9 Rendering System]
Then change it to...
Render System=OpenGL Rendering Subsystem
[OpenGL Rendering System]
If neither of the options above work for you, you could always consider re-installing Feral-heart. If you chose to do so, be sure to backup any files (presets, maps, meshes) that you want to save.