All BillBoards disappears when restarting the map.

[onv]

Hello .

I've got a little probleme , will BillBoards .
I place some billboards (custom one , like trollface etc...) on my map , and as soon as i go in-game or even restart the level editor , the aren't there (i mean , it's like they are here , i can move them , because i see the little red dot , but they aren't showed.I have the same bug with the custom enemy :

I created a new model , for the grunt, by attaching a nyan cat face at his head.I save, and when i want to put this model in-game , it's like i didn't did nothing. The monster is here , but not the nyan cat face.



Anyone got a solution ?