How do I set cull distance in C++ for road splines?


I have a scene with 200 road splines. Each road spline consists of multiple points with meshes attached to them. All done in C++.

Frame rate is horrendously low. All roads are drawn way further into the distance than they need to be. LODS for mesh are done. Need to be able to limit draw distance. Anyone know how best to set this for the meshes? I’m assuming I don’t need to worry about the splines themselves impacting, only the meshes. HISM is out of the question with them being spline meshes.