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About this paper
Federico Vasile, Ri-Zhao Qiu, Lorenzo Natale, Xiaolong Wang
AS-DiffMPM extends differentiable Material Point Method simulation to collisions with arbitrarily shaped rigid bodies, resolving contact particle by particle rather than applying a shared grid-level response. The authors connect this mechanism to rendering for estimating material properties from video. In particle-trajectory tests, its log₁₀(bulk modulus) error for Newtonian material against an Armadillo is 0.22 ± 0.24, but results vary across colliders and parameters; identification uses static colliders.
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