I don't know much about rendering actually, so i am always wondering how you can prevent objects to render behind other meshes.
BTW i actually have a 24/7 server running but i don't wanna share it right now, i'm still building up stuff and writing some tools to help me with my server (like a backup script but i've already finished that).
I'll probably make the server public soon, just don't wanna do it right now to keep griefers away.