How to specify something not to be saved in a scene?

Questions & Answers
1

I have a bunch of GameObjects in the scene called Node and Path.
Path uses Nodes to dynamically create a mesh and assign it to the MeshFilter component.
I create the mesh during OnValidate of Path.
This way I can see a curve road being rendered on both the scene view and the game view as I edit the scene. I can drag the Node and see the Paths referencing it being updated.

Problem is, I only want to save the Node and the Path, which refers to a list of Node. I do not want to save the Mesh gets generated dynamically into the scene because I want them to be generated during game play.

Is there anyway to do it?
Thanks

2

What you need is to set the objects’s hideFlags to any combination with DontSave. It’s actually a bitmask (since it’s called “flags”). Every UnityEngine.Object derived class has this. So it can be used even on Materials, Meshes, GameObjects, Components, …

The Unity editor actually has additional GameObject in your scene which are marked as HideAndDontSave. For example: The sceneview camera and some lights for the scene view.