Stefan, I have found another problem regarding layers. Logon Maloria, and warp to forest.nw. There's nothing wrong with the level itself, but the client seems to have some rendering problems with it and skipping tiles in the top layer randomly. If you resize the window a few times, it eventually renders the level correctly.
If you need to see how the level itself is designed:
http://forums.graalonline.com/forums...hp?t=134266558