robert-photos wrote:
That, my friend, looks like digital noise.
Prior to copying/inserting your subjects onto the new background run the background thru a noise reduction plug-in such as Topaz DeNoise. It might soften the background somewhat (which is not the important part of the pic) but will, if done right, even out the night sky.
I also noticed that the left shoulder of the older woman isn't 100%. you can see the background thru her sholder.
Thanks for pointing out the shoulder, I had not noticed it before. I will try doing the DeNoise and see if it helps any.