I've been trying to create a scene that works a bit like a scrolling webpage/webfeed (in the sense that the viewer can scroll up and down). So I have used the hover camera and constrained it to the y-axis.

However, what I would also really like to achieve is to have the content scaled across the length of the browser window when it is re-sized or displayed on different devices. It seems to be possible to scale the content using the 'vertical' sensor type but not with 'horizontal' sensor type. Does anyone know what I am doing wrong??