[Ogf-l] Transition from Copyrighted material to OGC

[Kyle Rode]

Say I create a realm similar to Greyhawk, Dark Sun, or Al-Qadim.  It has characters, stories, pictures, maps, content.  I copyright the work myself with US and Intl' Copyright offices.   Can I release parts of my previously registered, copyrighted material as Open Gaming Content?  At which point, I have given up my rights to the "clearly marked" OGC.   Thanks,   Kyle