The VDB Convert operator can be used to convert SDF voxels to Density voxels and vice versa.
Mode: controls which conversion mode (SDF to Density or Density to SDF) will be activated.
Iso value: controls the iso value for density grid conversion. Higher values bias the surface level towards higher densities.
Keep grid sparse: when enabled, simplified voxel groups in the VDB tree will not be broken up into individual voxels.
“Keep grid sparse” can reduce memory usage, but if voxels values are significantly changed in some way (ex: displaced), large square artifacts can appear in the grid.