Research led by Complutense University, Madrid, has discovered an array of ancient cave paintings hidden among previously described cave art. In a paper, "Animals hidden in plain sight: stereoscopic recording of Paleolithic rock art at La Pasiega cave, Cantabria," published in Antiquity, the team fills in details missing from previous photographic images.
I’ve visited several caves with Neolithic art in France and the way they used natural cave forms to accentuate the art was always called out. Holding a flickering torch at various angles would make the animals appear to move and dance.