Fig. 3
From: A multiscale model of terrain dynamics for real-time earthmoving simulation
As a blade and its active zone moves into the terrain a, new solid voxels are resolved into particles or fluidized mass that form the aggregate body. The voxel height value, corresponding to the solid occupancy, is found by projection to the failure plane of the active zone. When the blade is raised b, the gap is filled by solid mass converted from fluidized or particle mass in the vicinity of the edge