Came upon this elk skull on one of the valley trails in Yellowstone a couple weeks ago. The clouds were going in and out, and I posted up for a bit trying to get different angles in different cloud burst lighting. This was my favorite of the bunch.
As far as processing, the only non-global adjustment I did was a depth mask via the new DxO Photolab version, to darken up the background just a tad more. The skull being illuminated was a happy chance of light coming through the clouds.