[sldev] Improving rendering sequence

[Argent Stonecutter]

I think what you're seeing is the order that objects are downloaded  
to the client from the server. Since the client doesn't know the wall  
is there until it's downloaded, there's probably not much you can do  
in the client to fix this. I have thought that it might be a good  
idea for the server to apply information about the distance of  
objects from the agent in building the interest list, but  
unfortunately we don't have the server source so it's likely there's  
little we can do about that from here.