Im around most days, just say my name in the irc channel and ill respond eventually ;)

Also renders are fine the real issue is if your work is usable to other people's games, ie post the model or w/e not just a render of it

The redcross symbol is totally different then normal trademark.

actually the red cross is only  an issue if its a red cross on a white background and is protected by more then just trademark

The Red Cross name and emblem are not the property of the American Red Cross as a corporation. The American Red Cross is entitled to use the name and emblem only because it is the officially designated volunteer organization envisioned by the Geneva Conventions to assist the United States government in carrying out its treaty obligations. The treaties anticipate the existence of such an organization in each country bound by the treaties and authorize such organizations to make use of the name and emblem in carrying out the humanitarian activities for which they are established.

As the previous question and answer point out, U.S. prohibitions against the use of the emblem and name come from the federal criminal code. The prohibitions have nothing whatever to do with copyright or trademark law.

That is a great idea in theory, however nearly impossible in pratice, for example in some countries art with blood in it is illegal.