scan for tarfiles in CACHE_DIR, remember what Subdirectory a tar was found in, set the GCF_FLAG on GRFs loaded from there, and hide those in the NewGRF GUI
/* $Id$ */
/** @file transparency_gui.h GUI functions related to transparency. */
#ifndef TRANSPARENCY_GUI_H
#define TRANSPARENCY_GUI_H
void ShowTransparencyToolbar();
#endif /* TRANSPARENCY_GUI_H */