Post-production is the most important stage of any work and the simplest. The target of this stage is to add atmosphere and mood to the scene.
To make the fog image, I removed all the lights apart from the Target Direct light. I selected Shadow Map for the type of Shadow, with the addition of Volume Light Effect. I also made sure I'd turned off the VRay environment and then selected all the models, giving them a VRay material with a black color, and repeated the rendering again.
I composited the image inside the Photoshop. Firstly I merged the fog picture with the original picture by changing the layers to Screen and setting Opacity to 60% . I also corrected the colors and I added some simple effects by using the Photoshop brushes and the pretty plug-in "Color Efex Pro 3.0" to add atmosphere and mood to the scene (Fig.17).
And here is the final image (Fig.18)
I hope you find this Making Of useful and if you have any questions don't hesitate to send an email to me. Very best wishes!