gruta do escoural interior exterior - download free 3d model global digital heritage globaldigitalheritage ec231df cave one most iconic monuments municipality montemor-o-novo being widely recognized presence paleolithic rock art paintings engravings aspect its occupation inspired more than five decades research turn unveiled 50 millennia history today investigation continues addition recent archaeological excavation fortified settlement above application new technologies enhance conservation interpretation particular virtualization techniques such photogrammetric laser scanning pigment enhancement software have been applied better translate knowledge general public discover any other secrets may still keep