1. Create a scenario that contains an object/vehicle that creates more objects in an init function (http://tetet.de/arma/arma3/nimitz/experimental/@Nimitz.7z can be used as such an object)
2. Save the scenario
3. Observe that the constituent parts aren't part of the mission.sqm
4. While still in the original scenario with the object placed click new scenario
5. Observe the parts that weren't present in the mission.sqm are still present in the new scenario