Try reinstalling Feralheart to fix the texture malfunctions. Remember to completely delete the FH main folder located in your Local Disk (C:), so that when reinstalling the game itself, it can replace the empty spot with a new and fresh folder. That may fix your problem with the textures.
As for water reflection, press Esc. on your keyboard when in-game and a little window should open up. Click "Options" and another should pop up, one with different tabs for you to choose from. Click on "Video" and there should be an option titled "Water reflection" in the lit'le list provided. Click on that and you will be able to turn it on or off. Hope this helps.~