Unwrap without applying the Mirror Modifier! (READ DESCRIPTION)

17/JUL/2025: As of Blender 4.5, the mirrored UV automatically shows up in Object mode. I've trimmed out a certain section of the video as it was no longer necessary. In Blender, the Mirror Modifier has a hidden feature which allows you to mirror the UV without needing to apply it! It's a way to preserve a non-destructive workflow, and you may find a use for it on symmetrical parts (ex. Front Bumpers) It's not a massive game-changer, but it can definitely make your workflow a lot more fluid when you wanna make changes to your mesh. Happy modding!