ancient Angkor Angkor-Wat angles appearance archaeological archaeology artwork bas-relief buddhism Buddhist cambodia cambodian carved carvings craftsmanship cultural culture decorations decorative depictions Designs features grainy heritage Hindu Hinduism historical history icon iconic low-relief monument ornamental perspectives rough sculpted sculpture shaped stone stonework style surface surfaces temple-complex temples textured textures weathered base building concrete concrete-pad concrete-pour concrete-work concreting construction edged edging fill filling flat flatten flattening form forming foundation foundational gray grey level leveled leveling levelled levelling mix mixed poured preparation prepared preparing smooth smoothing solid solidify spread spreading strength strong sunlight tools wet work working