Something was not right in playground for documentation here.
https://playground.babylonjs.com/#MXCRPS#1
Let me fix this, please
https://playground.babylonjs.com/#MXCRPS#166
Cheers, Matthew.
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We accept pull requests! Will be great to review your contribution
Here the doc about modifying the doc Contribute To The Documentation | Babylon.js Documentation
and here the markdown page to update 
Documentation/Multi_Scenes.md at master · BabylonJS/Documentation · GitHub
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