Objects can have several flags to change their behaviour in the server and can be set with s3d_flags_on() and s3d_flags_off()
default:off
Obviously, if this flag is toggled the user can see it, if not it will be hidden. ;)
When an object is created it's turned off, so you will be able push your geometry data and turn it on after you're done. That avaoids flickering and stuff.
default:off
When this is toggled on, you will receive click events. Don't use it if you don't need it, it will eat performance.
default:off
Placeholder for pointer (onmouseover-event enabler) events. Not implemented yet.