The above is the viewport before I clicked the play button, and the following is the viewport when I clicked the play button.
The light environment changed, and the position of the car changed. Could you tell me what can I do to make them remain the same before and after I click the play button?
Do you have a character or pawn to possess when you start playing? If so, check if they have custom post process or camera. If they have post process, delete it and use it single time in map. If they have cameras, check if they have custom exposure settings or anything like that. If you don’t have anything to possess, Unreal will possess you with a Default Pawn. This pawn has no custom settings that might effect your visuals. If so, you might want to check if you have Post Process Volume inside of your Map. If you have it, make it “Unbound” in it’s details panel. If you had some custom post process settings and somehow missing the volume when start, this will show it. If you don’t have any camera and any post process to change your visuals, you might need to reset your Rendering tab inside of your Project Settings. If you are unable to check the correct settings, simply delete Config folder inside of your project directory.