So the one thing that made a difference was setting the FAR camera value from 1000 to 100, it is a lot smoother now, Frustum culling is working as if I turn it off I go from 270 up to 1700 draw calls, I found I had it disabled initially which is why it was using 700 odd calls, left over from some previous tests.
I don’t think it is doing what it should be as if I walk up to a “wall” which is a single planegeometry mesh with no floor or ceiling in view it states it is using 29 draw calls, but why 29? Nothing else is in frame, so it must be still drawing things outside of the viewable area. Screenshot below of what I am looking at (the planegeometry) vs the stats.
