What is the easiest way to use a custom frustum matrix?

Hello,

The (Unreal 4.5) application I am working on requires the final view to be split between 4 monitors, where each monitor displays one quadrant of the complete display. Currently I am looking at the FViewport class and related classes to see where/how the view matrix is setup. My questions are:

  1. Is FViewport the right place to look, or am I on the wrong path?
  2. Is there an easier way to do what I’m trying to do?

Thanks in advance for any advice!