I try to disable all the interaction (rotate, zoom, pan) with scene before user click, this is the playground I made
Disable interaction with scene | Babylon.js Playground (babylonjs.com), I used the same way as what I do for only disable zoom, Disable zoom | Babylon.js Playground (babylonjs.com) but this does not work, is there any suggestion here? Thanks!
If you set the alpha and beta limits to null instead of 0 then it will remove the limits like below.
But also you can just wait to attach the camera controls until the user clicks like this. 
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Thank you @Blake , I like the approach you gave much better
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