Spoiler I had no idea this was even a thing. I keep learning about more and more things that Gran Turismo 4 has to offer. Turns out that the pattern for the EyeToy camera to scan is actually a file in the game data. Said file is located under "eyetoy/gtshirt.bin" in the game data, and this is what the file looks like extracted from a texture viewer: And said pattern can be found on the shirt that was included with that Nike limited edition bundle. Here's a picture from that thread I just linked: And for anyone curious, here's some code that references it. The more you know I suppose! This was probably the most-interesting part of the quiz for me.