Smooth terrain LOD transitions?

I’m using Unity 5 and I notice that unity appears to be automatically applying some sort of LOD (level of detail) effect to my terrain. I like that. But, it give a fairly obvious “snap” appearance as I walk forward, each time a new higher detail level appears on a hill in front of me. I’m wondering if there is a way to make it fade or smooth transition between these detail levels. I tried adding a “LODgroup” component to my terrain, which allows me to select “crossfade”. However, this did absolutely nothing.

Not without creating your own terrain system, but since all LOD systems have drawbacks, the usual method is just to disguise the transitions in the first place (with vegetation, mainly).