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tutorial_changing_scenes.md

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+# Changing Scenes (Advanced)
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+### Introduction
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+Changing a scene in Godot is not often as straightforward, this is due to the high flexibility offered by the scene system. As there is nothing that really defines a "loaded scene", this must be done manually.
+
+The advantage of this is that it's easy to handle different common situations, such as loading screens (with progress bar), transitions (fadeins/fadeouts), preloaded scenes, etc.
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