'Allo deary, let's get this fixed f'er ye. Alrighty, 'ave ye downloaded anything lately f'er Feral Heart? Any maps, texture mods? If so, this may be the cause of y'er problem.
Could ye check y'er textures folder f'er me? This textures folder will be found in terrains, not the one in media. Can ye tell if anything is missing, like snow or the default orange, cracked earth texture? If ye be missing these, than all ye'll need is those files back. I be out at the moment, but I shall be home in a few hours and I would be happy to give ye a download to any missing files ye may 'ave.
'Ave ye been in the FH folders as of late? Ye may 'ave accidentally tampered with or deleted a file unknowingly. If this be the case, ye may need to redownload FH. If it comes to ye needing to do a clean download, make sure ye save anything ye want to keep in a separate folder, so when ye delete the FH files, ye keep y'er maps or items.
Let me know if ye be missing any texture files, though. If ye aren't missing any, I shall try to sift through the files to see if anything else would cause this.