So I have been using GIMP for all of my graphic needs for the past year or so. Unfortunately for me I am not a graphics person so 90% of what I do is very basic. My youngest son just had his first communion and I decided to make a picture for his gift table to show the holiness of the occasion. I used GIMP to merge the two photos of him and Jesus but the hardest part was cropping out him from the original picture. I took his picture near my stair case (he put on his most holy of faces), here was his original photo:
In the end I took a picture of Jesus, made it black and white and put some what of a haze over Him by making a circle that was filled with a gradient from white (in the center) to black (the edges) and then setting the transparency very high.