Hello SaintsAreDevils, have you downloaded any other modifications besides custom animations? Try going into C:/Feralheart and opening ogre.cgf with notepad when prompted. Take a look at the "Render system" section and switch to the one you do not have listed. For example, if you have
Render System=Direct3D9 Rendering Subsystem
[Direct3D9 Rendering Subsystem]
switch to
Render System=OpenGL Rendering Subsystem
[OpenGL Rendering Subsystem]
and vice versa. Honestly this sounds like there could be a problem rendering the character models, but it won't hurt to try what is above. Let us know how it goes.