Crowd Lights

Went to a punk rock concert last night.
I didn't know a lot of the songs so I zoned out a bit looking at the light bouncing off the audience. 

To simplify this light show I lowered the opacity of the crowd with a layer mask. Then added a simple silhouette  between the crowd and the black background

lower than 50% = darker gray = more transparent = shiny
50=Neutral gray 
higher than 50% = lighter gray = more opaque = dull

I like the range between 50-30 the best 

Color to Alpha for the overlapping parts and blurred the edges of the colored silhouette 

2 generated fog layers overlapped and color added

add a white gradient at the top and a dark gradient at the bottom. 
crop out the ugly parts