I extracted a plane and drew in the vapor trails. I also began to add water falling from the side of the closer building. I adjusted the brightness and opacity of the fall to match the rest of the photo.
I added two more “waterfalls” to the closer building. I used a technique where each waterfall layer is copied with a Gaussian blur, a lowered opacity, and a soft brush with a mask.
step 5 of 5
I drew in the tall fall with a brush and smudge tool on the distant skyscraper. I added a mailbox with its hue/saturation adjusted and details drawn out with a curves layer plus a mask to blend it in with the rest of the photo. I also adjusted the curves and brightness overall to create a more dramatic mood.