Remove mesh when closing to camera

You have any idea how to disappear foliage mesh when camera closer and appear when camera is far away? But not visisble and invisible i want remove and CPU not calculating this mash? I hope you undarstand sry bad English :wink:

The Clip Bounds (near and far) of the Camera is doing that. Everything to near or behind the camera, and everything to far away from. the camera, is clipped and so not rendered.