Elastic one-dimensional models with spinodal stress/strain behaviour (involving softening and subsequent re-hardening) are employed to explain features of continued deformation after strain localisation. Global softening of the response is strongly influenced by localisation of deformation, and multiple localisation with stress oscillation is observed, as induced by the re-hardening subsequent to softening. Since one-dimensional models are not sufficient to describe the behaviour of real materials, which always deformat least in two dimensions, a simple technique (small strain, piece-wise uniform fields and fixed shear band width are assumed) is illustrated to compute the post-shear banding behaviour of a two-dimensional elastoplastic sample. Although the methodology probably is over-simplified, it is shown that it may capture important phenomena, in particular, softening and size effect, band saturation and post-saturation, leading tomultiple band formation with possible stress fluctuations or delayed softening. All these phenomena are important in the understanding of the mechanical behaviour of many materials, in particular, granular materials.