Gordon. The background is created in PS to replace the original ugly one (spoiled glass windows of the greenhouse).
Here's what I have done:
1.- delete the original background afeter isolating it
2.- fill it with a middle tone gray
3.- Add noise (Filter->Noise->Add noise - 10%, gaussian and monochrome)
4.- Create a mesh like effect (Filter ->Brushe strokes -> Angle strokes- Direction balance : 50, Strole lenght `15, Sharpness :3)
PS is great to turn a good picture into an attractive one.
Gordon. I'm sorry I mixed up with another backgound change. In this one, I didin't do the first 2 steps. Instead, I isolated the background and made it darker by adjusting the brightness and contrast (that why you can see dark and light areas in the background). Then I added noise and did the mesh trick.