For vector graphics, I suppose you could encode information in the least-significant bits (with redundancy, error correction and whatnot) if the printer can gua

For vector graphics, I suppose you could encode information in the least-significant bits (with redundancy, error correction and whatnot) if the printer can guarantee sufficiently high precision (not accuracy, mind you: https://www.tutelman.com/golf/measure/precision.php https://www.tutelman.com/golf/measure/precision.php)