Nope! See, if you follow the readme, you want to place the .png file in FeralHeart\Media\Textures. And if you don't have any other water you've made already, place the .material file into FeralHeart\Media\Materials. Once your old one is replaced, go into the game and click 'Tools' then MapMaker. When you get into it, go to the second tab named World. When you look all the way at the bottom, there is a box labeled "Ocean Material" Type the name of the water you want that is in the .material file and type it in there.