When you want something to look wet and shiny, you also need to darken it. Light that reflects does not diffuse. Notice the difference in your side by side with the wet sidewalk. Your directional light should also be quite a lot brighter.
When you want something to look wet and shiny, you also need to darken it. Light that reflects does not diffuse. Notice the difference in your side by side with the wet sidewalk. Your directional light should also be quite a lot brighter.