It matters because I had no idea what you meant. You could have for example wanted to make a level editor. Or, maybe make your own models. Simply saying build something in game really isn’t specific enough to get you any help at all.
Anyways, it sounds like you just want to be able to place models while you are inside the game? Well, I would recommend using instantiate to ‘build’ objects in a game. If you want to change there materials in game, just set the instances to variables so you can easily change them.
yes building with objects that i have already created…sorry for the misunderstanding…also thanks for the link …
can I use this (instantiate) for digging on terrain in game to make a hole for example?