Tall iron sections were pieced together into a long wide one. Perspective and skew were worked until it fit. Liquify was used to make the span not quite so straight.
step 6 of 9
I made a brush to apply some snow to the stud tops. I also made a couple more to use on the ones that were at more awkward angles from the distortion. Some of the round studs were distorted too much, so I used the smudge tool to recover their shapes somewhat
step 7 of 9
Some snow is applied to studs.
step 8 of 9
Snow was added to studs and softened with gaussian blur. Clone tool was continually used to fix obvious seams and repetitive shapes.
step 9 of 9
Blanket of snow above the wall was copied and given a slight shadow along the bottom to make it lap over the wall a bit.