Pabloukiyo asked me for an idea on how to fake 3D in an isometric game. I'm answering him with a capx and posting it here for anyone to use.
There is a static object to represent a building and the bouncing object is to show that the depth is not restricted to discrete layers.
I managed to comment the event sheet this time. Let me know if it's not clear or if you have any questions.
When you enable perspective I guess it's not really isometric anymore lol
http://www.cargocultgaming.com/notisoanymore/
https://dl.dropboxusercontent.com/u/26348967/3D_iso.capx