Duplicate your render, Gaussian blur the bottom render by 25. Filters>Blur>Gaussian Blur. Turn the layer mode to dodge, lowering opacity, or screen, lowering opacity. Then duplicate that layer and move it above all other renders and make the layer mode overlay, lowering opacity.
John 3: 16: For God loved us so much, he gave his one and only son, and who ever believes in him will not perish but will have eternal life.
Also, try to blur or smudge in a direction and only certain parts of the render to make it realistic. I see you blur almost the entire body but the head and all no direction. The background seems to be all random and no flow. And I think I see fractals behind the render, don't try to use them because they are horrible, man! To make a decent background, Duplicate your render a few times and use the smudge tool and a splatter brush and set the spacing to 5 or something and jitter at normal and just smudge it all in one direction. Don't smudge it all until it's smooth as a baby's butt... leave it kinda rough. That's a good start to a background if you have done it right.