gm unhide not refreshing area

Originally posted by [b]theultramage[/b]
http://www.eathena.ws/board/index.php?autocom=bugtracker&showbug=2266

We identified another consequence of the clif_move() optimized packet.
FYI, it works like this: the big packet contains all sorts of visual information. The small packet only contains the object id and movement path. The small packet is sent if there is no need to send the big packet. And the only reason currently being when walk speed changes.

Now, being in GM hide prevents clients from knowing your visual information. If you walk into view range of some client and then unhide, they still don't know how you look like. And when you walk, only the small packet gets sent the client still doesn't know how you look like.

Consequence: if you gm-unhide, the people nearby won't be able to see you. They will get position updates but your character will not get displayed until they refresh or you leave the screen and come back. This also has the potential to cause client crashes.