The volumetric collapse of a low-density slope and the subsequent failure induced by wetting have been simulated with Anura3D. To do that, the Clay Sand Model (CASM) formulated in terms of Bishop’s stress and suction in order to extend it to unsaturated conditions[1], has been implemented. The one-point and two-phase with suction formulation[2] has been used. The experiment consisted in a centrifuge test that was video-recorded and interpreted using the PIV-NP procedure. This method provides the accumulated displacements and strains of numerical particles that discretize the soil model. It is especially suitable to validate MPM-based results with image-based measurements, as material points can be directly compared with numerical particles. The modelling of the experiment involved the construction of the slope by layers at 1g (g: gravity acceleration), the increase of vertical acceleration up to 50g, the application of wetting to induce the volumetric collapse and failure, the run-out and final deposition. Despite some inaccuracies, the simulation successfully reproduced the observed behaviour. References [1] Gonzalez, N.A. (2011) Development of a family of constitutive models for geotechnical applications. PhD thesis, Universitat Politècnica de Catalunya, Spain. [2] Ceccato, F., Yerro, A., Girardi, V., Simonini, P. (2021). Two-Phase Dynamic MPM Formulation for Unsaturated Soil. Computers and Geotechnics 129(103876).