Most of the models that I have seen have come from the media or from other computer games. What about models based on artwork or actual miniatures from non-computer games (Full Thrust, B5wars, Silent Death, etc.). Would 3D models be considered derivative works for copyright purposes?

I played miniatures games before I found out about SFC and I would like to model some of my favorite ships from these games. I know that ADB has given permission for their creations. Could someone who has looked into the copyright issues of models give me some information on this issue?
:police:I don't want to violate anyones rights to the use of thier work:police: