Orthographic Camera (Rivers dont render)

Hello,

I am tinkering with using an orthographic camera as it creates a nicer experience for map navigation. (fits into a square without having edges inaccessible at the bottom left and right)

Its not hard to change the cameras but when I do the rivers no longer render. I did try adjusting the river camera (which I notice is off) to the same settings and rivers still don't show.

Is it possible to use the system in orthographic mode?

Thanks