Fog is more likely to form near the surface of water, often near creeks, river valleys as the water increases the humidity in the air.However, both mist and fog reduce visibility. Fog shows up when water vapor, or water in its gaseous form, condenses.What is fog?įog is a visible aerosol consisting of tiny water droplets suspended in the air. Fog Photoshop brushes that you can download for free! In this pack you will find 12 fog and mist brushes.