hello, how do i define which scene is the one that is first loaded when the application starts?
If you want the editor to open in a scene when opening the project, change it in “Projectfolder”/Library/LastSceneManagerSetup.txt
In the main menu => File->Build Settings… then the first scene in the window.
It’s all here : http://unity3d.com/support/documentation/Manual/Publishing%20Builds.html
3rd paragraph under the picture : At this point, notice that each of your scenes has a different index value. Scene 0 is the first scene that will be loaded when you build the game. When you want to load a new scene, use Application.LoadLevel() inside your scripts.
hope all the information in the link is helpful.
Even though I had my scenes in the build settings set up right, the correct scene was not opening whenever I tried to run from the editor. I discovered that I had to have the scene I wanted to open first be the one that was open in the editor at the time (this is in 4.3) instead of another scene.
Documentation URL (as of early 2018):