I accentuate some light on the edges of the arches, the top of the viaduct and on the side of the pillars. I also want to have a stronger focal point, so I use the Dodge tool to darken some areas and lighten others. I also place vignettes in the corners where less attention is needed, using the Dodge tool in Highlight mode at 10 per cent. Pressing Alt enables me to switch between darkening and brightening. I then add a couple of god rays from behind the big statue, to further enhance the atmosphere and light direction.