Addon: X-Ray with Night Vision
Author: Neq-gamerz
Use the view to check nearby ore veins before choosing where to dig. It changes how the underground world is displayed rather than adding new ores or mining tools.

Required setting
Disable Smooth Lighting in the video settings. Leaving it enabled can make ores difficult or impossible to see through the surrounding terrain. Activate both included packs and reload the world if the view does not update immediately.
This release is intended for single-player worlds. The author lists Minecraft 26.50 and newer and describes the addon as achievement-friendly.
Minecraft version stated by the author: 26.50
How to install the add-on
Download the .mcaddon or .mcpack file, open it with Minecraft and wait for the import to finish. Then enable the resource and behavior packs in the world settings. If the add-on requires experiments, turn them on before launching the world.