"Tree act structure" does not just mean that a story is split into three parts. At least as used by screenwriters, it is a term for a tried-and-true narrative s

"Tree act structure" does not just mean that a story is split into three parts. At least as used by screenwriters, it is a term for a tried-and-true narrative structure with a lot of well-defined elements, for example that the protagonist should get a goal in the beginning which transform into a deeper personal goal, that stakes should increase and the protagonist have their deepest core challenged and so on.