When shooting on a gray background, the nice thing is it is easily detachable in Photoshop to subtly adjust. Here I went for quite a bit of subtle post-processing : ProRetouch from Totally Rad (not affiliated but I love their subtle actions), then in the second pass a Sean Archer action. The latter gives some subtle extra lights and less smooth background (actually requiring you to more or less shoot on a 50% gray backdrop) . With lovely model Simone.