It's always bothered me that when one is Hunting for meat the hunter doesn't bring back any Leather, and Vice Versa, as well as the fact when you mine advanced Materials you don't get any basic stone. Of course this won't be as efficient as searching for the specific material because Harvesting Leather would prioritize things with large skin and maybe not necessarily a large quantity of meat. I am not sure if this is a limitation imposed by the engine or not. I am going to try and fiddle with some things myself, but i am a total noob when it comes to modding this engine.