Bridge at Mason Park

[nachoman]

You could always darken the shadow areas with weathering and paint to simulate what is seen in the real world. I've seen people adjust certain colors on their scenery to make certain areas appear darker or lighter to better simulate natural sunlight. It's actually a common technique - people often drybrush white or a light color to bring out details. You could do the same with a dark wash under bridges and in alleyways, and any other area you want to "de emphasize".