level set Tree type requirements for implicit surfaces

[Andrew Bauer]

Hi,

Are there any requirements on the Tree Type for level sets when using implicit surfaces? I'm trying to export out VDB files from my package using v8.2 and when I export out a level set with Type Tree_ptdataidx32_5_4_3, other packages that read in these files don't recognize any implicit surface. If I export data as a level set with Type Tree_float_5_4_3 the packages do recognize an implicit surface. This is the same behavior with the sphere.vdb and sphere_points.vdb example files at the bottom of https://www.openvdb.org/download/. 

Thanks,

Andy

[andre pradhana]

The underlying tree for a level-set grid is a scalar tree, e.g. a double tree or a scalar tree. Many packages also check whether the grid is of 'class' GRID_LEVEL_SET.