This paper proposes a procedural metamaterial that produces an orthotropic elastic behavior, with different degrees of elasticity along orthogonal directions. The orientation and strength of orthotropy is freely controllable in space, without requiring further optimization. Compared to isotropic materials, this better adapts to uneven load scenarios and offers greater design flexibility.

A printer that embeds magnetic flakes in a photo-cured resin, allowing orientation distribution of the flakes to be controlled with a magnetic field at fabrication time. The paper demonstrates optical effects including bump maps: flat surfaces with spatially varying specular lobe direction.