Sounds like you've got duplicate files! Check uh, FeralHeart>media>particles for any files ending in: _0 _1 _2 etc. Don't be afraid to make maps! We'll (referring to me, helpful players & mods) be here if you encounter anything else. Also, just make sure your masks/heightmaps don't have alpha channels, are 513x513, are flattened, and when you're making heightmaps, be sure to set your program to greyscale/grayscale mode! Have a nice week!