I wanted to learn more about how to implement fog with VrayEnvironementFog. I don’t really like it. I think it is very complicated to set up and it takes a very long time to render. I think it is more efficient to apply fog in Photoshop with the help of the Zdepth mask.
Another lesson I learned: it is much more effecient to apply the windows on a skyscraper as a texture in 3ds Max as much possible. For this image I drew all the windows as geometry in Sketchup. The result is that these buildings are very high-poly and are not easy to handle. You also don’t have much room for applying certain effects on them like random dirt and lights. Lesson learned. :-)