I recently have done a few tutorials and have starting playing with blending layers in Gimp. It has been a lot of fun just playing around and seeing what I can do with it.
In this picture of myself, I did a motion blur on the background. Then I made minor curve adjustments. I made a copy of the layer and then made the bottom layer black and white. Finally, I changed the mode of the top layer to overlay.
Here’s the before and after… (click the thumbnails for close-ups).




