The Solid Eye bundled with the game is a cardboard attachment that clips onto the PSP in a manner similar to the pictured plastic prototype. Unlike "traditional" 3D glasses, which use red and blue lenses to create 3D effects through forcing the eyes to recompile an anaglyph image (i.e. merging two layers with red and blue outlines, respectively, into a single image with black outlines), the Solid Eye works by allowing the user to view a split-screen of two near-exact images (the split-screen effect is evident when Solid Eye content is displayed on a PSP without the attachment) and merge the two feeds into a single 3D feed by resolving the contrast differences.