A 3-form exploration of the landscape

<!--HTML-->I will discuss four-dimensional N=1 supergravity models including 3-form potentials and membranes. These provide a general framework to describe the EFTs of string/M-theory compactifications to four dimensions, in which (part of) the internal flux quanta arise as expectation values of the 4-form field-strengths and large portions of the landscape can be explored within a single EFT. The application to concrete string models unveils some interesting universal patterns.