i just want to avoid situation where i make smoething he cant make given the similar items. Example: if you run around picking up things from different biomes either off monsters or off the ground. But you cant actually make anything with them untill you have beaten a boss. but as i have already beaten that boss on my character, i can make it.. and he would wonder where i got that item from.

Examples: finewood bow need bronze axe, but you could roll other tree's on it and farm the wood that way.
Troll is hard to kill while in medows, but doable. i could get its mats early.. do the recipes unlock on picking up the troll hide? or when accessing crafting station with bronze upgrades needed to unlock it.

But i think i have the answer somewhere from your replies, so thank you..

Originally posted by umop-apisdn:

Resources you pick up unlock the ability to craft the things that you can make with them. If you have started a new world, then you can only build with what you have on hand.