Does the 5% royalty cover everything?

Might be a silly question but i’m not really that into laws and license agreements, stuff like that, so i want to be on the safe side. But anyways, does the royalty at 5% cover every singel tool originally implemented in Unreal Engine 4 like Nvidia integrated apex cloth, physics and so on. Because i noticed that Nvidia in this case also had a royalty on these tools. Or do you have to pay this royalty as well as the unreal engine one? Or is it just to pay the 5% and you can use every available tool originally in the engine without having to pay anyone else?

Thanks in advance!

Yes, the 5% royalty covers everything included in the Unreal Engine distribution - there are no other hidden costs or fees.