Creates a generated shell representation set in a SceneModel.
This is the model-side utility used by viewing-layer impostor shell LOD. It
creates the shell geometry, mesh, object and representation set together so
the model itself declares that the source objects and shell object are
alternative representations of the same logical content.
The shell follows the ShellGeneratorResult coordinate contract:
generated positions are relative to the generated center, and the shell mesh
is placed at that center.
Creates a generated shell representation set in a SceneModel.
This is the model-side utility used by viewing-layer impostor shell LOD. It creates the shell geometry, mesh, object and representation set together so the model itself declares that the source objects and shell object are alternative representations of the same logical content.
The shell follows the ShellGeneratorResult coordinate contract: generated positions are relative to the generated center, and the shell mesh is placed at that center.