med stud said:I don't understand what this has to do with the rules. Unless I missed something it is up the DM and players how much interaction that is necessary with game world elements.
The rules determine what it is that you need to do to be successful. In most people's campaigns I don't have to worry about starving because no one really keeps track of food. This means I don't really have to worry about supplies and supply lines and such. IRL if I were going to march around in the jungle for a month I'd have to have all kinds of supplies, which means people to carry them and the appropriate social network needed to hire them, etc. In a typical DnD game, me and my three friends can just head out into the woods and dispense with dealing with NPCs. The realistic circumstances of the real world keep me immersed in it and forces me to figure out my environment (the "NPCs" and places so to speak).
Then again I'm not saying necessarily that bartering with merchants in order to buy talcum powder because your DM has some sort of weird "jungle rash" rules is all that heroic or interesting when it comes to gaming. There's a sweet spot though, and the more of these versimilitude things you dispense with, the less real game reason that the PCs have to interact with the world, short of just killing things and taking their stuff. Roleplayers will interact with NPCs as a hobby, and DMs may impose some interactions by fiat, but the game framework justification for doing this won't be there.