This is exactly the same as a 
                    3D Group
                    A Group of 3D Layer
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                    , but for stage elements.
                          Groups are typically useful for two things:
      
                    
                      - 
                        Group objects in order to organize the stage and make it easier to manipulate.
                      
- 
                        Group objects in order to link them in space and be able manipulating the whole group with a single 
                        3D Placement
                        Defines a placement in 3D space
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                        .
                      
                          The second situation is typically relevant when working with motorized elements in the stage. All objects subject to the automation
      should be inside the same group.
      
                          To import a FBX in your stage go to 
                    Import as Group in the Stage
                    Learn how to name your object in the 3d Software of your choice before importing your FBX in Smode
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