Paul Finch makes a valid point in his article on tall buildings, that 'any applicants proposing significant tall buildings should expect to be asked for photorealist montages' (AJ 15.3.01).
Take the photo-images used in his article of the Heron Tower proposals for the City of London. This does not show Foster Partners' Baltic Exchange site development, which would presumably be completed before the start of Heron Tower.
While it shows the Canary Wharf Obelisk (just) it does not show the massive office towers which now frame it.
And what about the proposed Renzo Piano office 'steeple' at London Bridge, just off the right-hand side of the image you showed, but which would have a major impact on the view from Waterloo Bridge Martin Andrews, Guildford Street, London WC1