Photo Compositing with the GIMP

Basing from my previous <a class="zem_slink freebase/en/gimp" title="GIMP" rel="homepage" href="http://www.gimp.org/">GIMP article titled Creating Pseudo-3D Imagery with GIMP, you learned how to do some basic selection manipulation, gradient application, faking <a class="zem_slink freebase/en/depth_of_field" title="Depth of field" rel="wikipedia" href="http://en.wikipedia.org/wiki/Depth_of_field">Depth of Field, etc. In line with that, I’m following it with a new article very much related to the concepts discussed therein but we’ll raise the bar a bit by having a glimpse on <a class="zem_slink freebase/en/compositing" title="Compositing" rel="wikipedia" href="http://en.wikipedia.org/wiki/Compositing">compositing, where we’ll use an existing <a class="zem_slink freebase/en/image" title="Image" rel="wikipedia" href="http://en.wikipedia.org/wiki/Image">image or <a class="zem_slink freebase/en/photograph" title="Photograph" rel="wikipedia" href="http://en.wikipedia.org/wiki/Photograph">photograph and later add in our <a class="zem_slink freebase/en/dimension" title="Dimension" rel="wikipedia" href="http://en.wikipedia.org/wiki/Dimension">2-dimensional element seamlessly with the said picture.