I extract from enUS.
You need to make a file wmo_lists.txt and then use vmap4extractor and vmap4assembler
if you dont make wmo_lists.txt the extraction will probably fail
vmap4extractor
vmap4assembler
E:World of Warcraft>vmap4assembler Buildings vmaps
using Buildings as source directory and writing output to vmaps
Could not read dir_bin file!
exit with errors
Is this normal ?