This document provides instructions for adding realistic fog to a photograph in Photoshop. The instructions are: create a new layer above the image layer and set the brush tool to paint light gray horizontal lines representing fog; vary the opacity and thickness; apply Gaussian blur with a radius of 14px; add a layer mask and use the gradient tool to fade the fog from white at the top to black at the bottom.

1. Realistic Fog Photoshop Tutorial 2 By Suzanna Yeichy