Is there a way to render an equirectangular without nDisplay?

I’m currently trying to render a scene using Unreal on two monitors. One maps to a cylinder and should be rendering the entire scene in 360 degrees, essentially rendering an equirectangular. The other monitor instead maps to the pavement of the cylinder.
I’m currently trying to use nDisplay but I have been dealing with plenty of issues ranging from poor performance up to network issues which have been hard to deal with. Is there any way to avoid using nDisplay? Or is it the only way to have such a setup?