I deleted the sky/ground from sh3d photo to see the background. Then I made my slanting terrain model (green at level 0) semi-transparent to blend in.
I see now that I seem to have added transparency to the chalet itself too, but that was unintended
The chalet is an "eagle's nest" and the vista is just like this. Virtual globe makes it easy, as it supports geo-co-ordinates and angle of view in a hyperlink (thinking plug-in linking from the compass in sh3d, but maybe not really useful).