Hi,
I'm getting a bit bogged down trying to sort out the 'background" sky of this Image....
I coundn't find anything on the net (apart from something that told me to "map" the image to the Camera's colour? - when I tried this it just blotted out the rest of scene?)
I'm also confused what the "Env Sky" texture node? is/does and would it help me?
In the end I just made a poly plane and put the image on that, surely that's not how it's really done?

Scraggy

[EDIT] - I lightened it up a bit, but sorry it's so dark - seems to go darker when posted. Thanks to Mayang's Textures for the background.