Okay, just as a courtesy, don\'t double post. you could have added to your previous post by using the edit button.
you should be able to get a list of possible commandline arguments by running psclient -help
Since the x-ray tree texture is caused by a screwup in the exporting of the map file, there is no commandline argument to fix it

also, commandline arguments are not exclusive to the mac so you probably could have made this thread under another heading but meh

josePhoenix