Chrono Trigger Prism Cards
Prior to Chrono Trigger's release, several cards depicting character artwork and scenes from supposed beta versions were released; these seem to offer further insight into stages of the game's development prior to the Prerelease -- however, it was commonplace for developers to simply produce mockups of scenes and submit them. A mockup is not an actual ingame screenshot, though it may use graphics from the game; it is a fabricated work. The various differences apparent in the prism scene cards suggest that they are mockups, though some may be actual screenshots. These screenshots appear on the back of each character and scene card. Additionally, the holographic inlays on the front sides don't scan well.
From: Chrono Trigger Prerelease