I didn't mean to get defensive, although now that I read my post I see how it may have seemed so :-)
I see what you mean now; but the SE background is quite obviously the original background enhanced by CG elements and I 'm actually pretty sure that the ground is original. It's only been recoloured and it seems so crisp and shiny because it's HD. But if you'd be able to make a new background plate that would look even more like the original in HD, I'll be glad to try and use it.