ArcRotateCamera.upperRadiusLimit is set, then it is not possible to zoom out beyond the limit. But you can zoom in, until you pass (0,0,0), and then start zooming out. Then the limit is no longer applicable.
- Go to https://playground.babylonjs.com/#SRZRWV#510
- Zoom in until you pass red plane
- and then start zooming out.
You will notice that you can zoom out beyond the upperRadiusLimit (set to 20)