I kind of did it in a test terrain using 2 layers aof geometry and some multitexturing between the two. An example can be seen here:
http://s93153354.onlinehome.us/rot.wmv
doesn't have the detail, and you will probably have alpha problems but it still looks cool. About 512k in WMV format
http://s93153354.onlinehome.us/rot.wmv
doesn't have the detail, and you will probably have alpha problems but it still looks cool. About 512k in WMV format