Eaglecraft X-ray Texture Pack

EagleCraft is the best "pure texture pack" option. If you are willing to install mods, an actual X-Ray mod is stronger, but EagleCraft is easier to toggle on/off.

Only use EagleCraft on private servers or your own world. Do not use it on competitive mini-game servers. eaglecraft x-ray texture pack

The transparency is implemented cleanly – no weird z-fighting or flickering, at least on OptiFine or Sodium with connected textures enabled. EagleCraft is the best "pure texture pack" option

EagleCraft X-Ray does exactly what it promises – perfectly. If you want to strip-mine a single-player world quickly, test redstone contraptions with easy access to all blocks, or grief on an anarchy server, this pack is invaluable. But if you care about Minecraft's core loop of exploration, risk, and reward, EagleCraft will ruin that magic. Do not use it on competitive mini-game servers

If you find EagleCraft too cheaty or unstable, try these legitimate methods to find ores faster:

However, there is a limitation: Minecraft will not render blocks if there is nothing behind them. When you look at a mountain with EagleCraft, you will see floating ores. But as you move, the game updates, revealing hidden ore veins behind the walls.