Finite Element forward model (top) of strain in a fault propagation fold with complex mechanical stratigraphy produced using Rockfield Software's ELFEN FM toolkit. Material grid shown with plastic strain localisation (dark sub-horizontal band) nucleating in crest-forelimb. Forelimb thinning and hinge thickening also observed in model & nature. With increased shortening model will likely evolve with a forelimb truncating thrust  as seen in the outcrop of a Variscan 'break-thrust' structure from Broadhaven, Pembrokeshire, UK. Strain from model can be used to predict fold and fault-related fracture intensity and kinematics and can be integrated in reservoir models and used for well planning.