It's a mix of both. The MI1 marbling uses the scanned sides of the big box (when taking off the lid), upscaled with an AI model. I then utilized Photoshop's "content aware fill" to build a huge, seamless pattern out of those scans. So in this case it's not exactly what was scanned, but a new pattern built out of those shapes.
MI2 mixes a sandstone texture with the cracks and shading of the scanned game manual (the Korean version, if I remember correctly).