I did this by selecting rectangles, adding a 2pix grey stoke & dropping a shadow to make it look three dimensional. I concentrated on the two front stands, the line along the bun and the traffic lights. I put less shadow behind other areas of the image.
TOP PHOTO:
Had an email from Julian saying that it (3rd from top photo) was all too busy & perhaps emphasise the building, not the surrounds. At first did it in all colour (2nd from top photo) but footpath too awful, so turned it to B&W. Looks better.
Above are steps 19 & 20 as well as the Catherine Nelson original. Pleased with progress. Could do more to puff up the sphere in mid to outer range of leaves - if time permits.