ancient Angkor angles appearance archaeological archaeology Bayon buddhism Buddhist cambodia craftsmanship cultural culture damp decorative design face faces features height heritage high Hindu Hinduism historic historical history jungle lichen mixture monument mosses old ornamental perspectives reflective sculpted sculpture shaped statuary statues stones stonework style surfaces temple-complex temples textured textures weathered arched-windows architectural-elements architecture building city contrast cream dark decoration exterior external facade fancy frontage glass light masonry ornamentation patterns ridges roof segments shapes solid Somber sombre sunlight sunshine surface top variation variety wall windows