This option will determine visibility on either render or the viewport visibility. Same for modifer settings. So it will either evaluate the depsgrah with DAG_EVAL_RENDER or DAG_EVAL_VIEWPORT. This not only makes it more flexible, it is also a lot clearer which visibility / modfier setting is taken into account (up until now, this was always considered to be DAG_EVAL_RENDER) This option was always present in the USD exporter, this just brings Alembic in line with that. ref. T89594 Maniphest Tasks: T89594 Differential Revision: https://developer.blender.org/D11820