To draw fog in Photoshop, follow the steps given below:
- Import your image on Photoshop or make a new canvas
- Click on Filter > Render > Clouds
- This would give a smoky cloud background, repeat this process twice or thrice
- Go to the layer’s panel and change the blending mode to ‘Screen’
- Use Hard Eraser and erase those portions of fog that you think are irrelevant
- Finally, choose Soft Eraser tool, increase its pointer size and then blend the fog
- Once you are happy with the blend, save the changes and then export your file.