Just how advanced are the next-gen versions of Assassin's Creed IV: Black Flag ?

Even the freakin' leaves have physics. That's right.

With better hardware comes more technical capability, and Ubisoft is taking advantage of the extra power for the PlayStation 4 and Xbox One installments of the new Assassin's Creed .

As outlined in a new next-gen walkthrough, we learn that if we look closely enough, we'll see all sorts of fresh, dynamic details. For example, director Ashraf Ismail told GameSpot that even the plants and leaves will react to weather systems and player interaction.

That's hardly the only achievement, but Ismail added that most of them will unfortunately go "unnoticed" by players:

"I guarantee 99.9 percent of the people won't even notice, but there's going to be a few people that pick up on certain details and it's this stuff that I think will show that we truly love this experience."

They've even implemented a specific "sea engine" that looks to replicate the genuine movements of actual waves and ocean colors. Ismail said they wanted this title to become the "most immersive Assassin's Creed yet," and features like the new weather system (that includes independently lit rain drops) and volumetric fog will help that happen.

Assassin's Creed IV: Black Flag is set to hit store shelves on October 29 for the PS3 and Xbox 360, and it'll be a launch title for the PS4 and Xbox One.