Apperantly, Working Dir is directory with result executable binary file.
you are not right
working dir is root directory with all resources, you should not exit from it
binary file could be located anywhere
so if you will work on own global Z ordering
here is some tips for you:
it is protected method which give you access to 'flags' where you could store your own 'z-order' flag without custom inheritance from each actor/sprite
override virtual Actor::render and collect all actors to vector<> with priorities. sort then draw this list
you will need to save RenderState/Transform too for each Actor to correct rendering
Looks like your connection to Oxygine was lost, please wait while we try to reconnect.