Abstract: A computer implemented method comprises receiving a mesh representing a 3D object, the mesh comprising a plurality of 2D shapes, receiving a strand feature comprising a plurality of virtual strands, and associating each strand of the plurality of virtual strands with a 2D shape of the mesh.

Abstract: A method comprises determining positions of render strands based on a simulation model of simulation strands. Each simulation strand corresponds to a render strand. For a first range of values of a metric up to a threshold value, the simulation model is determined in a first simulation level using a first set of simulation strands. For a second range of values of the metric from a second threshold value, the simulation model is determined in a second simulation level using a subset of the first set of simulation strands. For metric values between the first and second threshold values, a transition between first and second simulation levels comprises computing the simulation model in the first level of detail. Positions of the render strands during the transition are derived from the first set of simulation strands having a first weight, and the second set of simulation strands having a second weight.

Abstract: A computer implemented method comprises receiving a mesh representing a 3D object, the mesh comprising a plurality of 2D shapes, receiving a strand feature comprising a plurality of virtual strands, and associating each strand of the plurality of virtual strands with a 2D shape of the mesh.