Therefor, ona sever, you can not use the vecmath operations and Transform3D (we do this in the
BattleTrolls demo) but you **cannot** use the scenegraph unless you knwo you wil lbe deploying on servers with X11 and a graphics screen,
On linux you can use Xvnc which mimics the graphics card and everything works great. I did this on a production game server and never had any problems (once I got it configured). This was quite a while ago. Before Xvnc and on Sun I used to start XWindows from the rc scripts and have the xhosts + command in the .dtrc (I think it was .dtrc) file. This also worked great, but is not recommended unless you are behind a properly configured firewall. There always seemed to be security issues with X and Tooltalk.
Xvnc is typically part of the default X11 install so it should already be installed.
Wood