How can I force LXDE to have a transparent background when connecting with X/X11?

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http://unix.stackexchange.com – Just got my Raspberry Pi in the mail and I've started playing around with it. After getting LXDE up and working working in desktop mode (i.e. monitor and keyboard plugged in) I decided I wanted to connect to it remotely. I know I can use a VNC/RDP client but maybe for now just connecting with XForwarding and launching lxsession would be fine. To describe my environment, I'm using OS X I had previously installed XQuartz.app to replace the native X11 app (because it boasted more features and benefits for using X applications). The first time I connected as root via ssh to the remote machine (HowTos)