How do I completely cull a StaticMesh over a huge landscape?

I have a staticMesh of a fence which I’m LOD’ing aggressively to kill the transparent fence part down to a fence post which I want to completely cull at distance.

The problem I have is that there is a huge landscape with a fence around a large portion of it and the player camera can fly so it can see 2000 odd fence posts which are to small to see.

So how can I completely cull this object?

BTW A big thank you to Epic for the landscape spline tool, I love it!

Note: cull distance volume doesn’t work on this mesh, presumably because its part of the landscape or perhaps due to the spline being the object so it doesn’t cull based on the mesh size.

Fixed in version 4.1
“LANDSCAPE AND FOLIAGE
New! Landscape splines now have a Max Draw Distance setting for meshes on the spline.”