A build file for an HB3D machine should be a zip file containing:
Part = *.stl file
Support = *_vless.stl and/or *_solid.stl file(s), optional
Machine = *.h3d file. Additive Print uses version 1.0 of the *.h3d file specification.
Notes:
An HB3D build file ignores the last layer when the distance from its Z coordinate to the Z max is less than one layer thickness.