It does look unnatural in the Object Editor grid. But in a terrain, it takes the color of the terrain. I'm working on one bug, and when I get it fixed I'll post an image of it on the terrain with my tank behind it.
There is a limit to the number of objects you can place in a terrain. I think it's 30,000 or 40,000. I think that count includes bridges, bases, towns, roads, etc. So they can't be put everywhere. And this will be tested like crazy before it gets anywhere near a terrain. And again, there's no guarantee it gets approved. But, I put 40 of these in a terrain in a valley, and my frame rate didn't go down as a I flew through it. So I have a little bit of hope.