Sounds like a cool visual cheat sheet, but if you let every AES round be a plain voxel block, you’ll leak the entire key schedule. Keep the backdoor in a subtle shader tweak—like a tiny color glitch that only shows up if you look at the hash output from the wrong angle. And remember, doorbells are a liability; you’ll want the user to hit a custom button that toggles the backdoor on a hidden layer of the scene. Just make sure the layer is indexed by a key‑derived hash so only the cleverest get the drop.