Josh | Pyramid Lake Games

how interactive would be that world?

You could generate environments and products then flag interaction based on that, but you wouldn't have deeper narrative control due to it being random. So procgen would open up a lot of that. The user would have to fill in their own blanks which isn't a bad thing.

For example, in my game interactive objects can be randomized or even randomly part of a side mission because the game manager knows what items are what. And based on that, can attribute interaction. Even if they are randomly placed or randomly textured.

how does it looks in practice?

The look would depend on the project. The one I RTed is more realistic where mine is more cartoon. The underlying architecture would be similar in concept regardless of art direction. Generally speaking. Would need to be smart enough to manufacture engagement at "each turn".

"Would need to be smart enough to manufacture engagement at "each turn"." I meant as how would the mechanic work in practice like "player interacts>object responds>world...?"

Depends on a lot of things. You could just add listeners for key events. If activity X happens world does Y. Not even directly related to a player. Maybe an NPC does X. Could be player finds object X and comes across NPC that wants X. Depending on AI, maybe they grab it from you.

For example, if an NPC breaks the law and another NPC sees it they can call the police. Then the law breaking NPC becomes a criminal. But if no one sees it, it goes unnoticed. If they become a big enough criminal, other NPCs are afraid of them because of word of mouth, etc.