: Most Eaglercraft clients allow you to drag and drop the downloaded .zip file directly into the browser window or use an "Upload" button within the Resource Pack menu.

While many packs exist, these are the most reliable for the 1.8.8 version used by Eaglercraft:

: The gold standard for transparency packs. It highlights all vanilla ores while making stone, dirt, and gravel invisible.

Simply activating the pack isn't always enough. For the best "see-through" effect, adjust these in-game settings:

: A lightweight pack designed specifically to show ores, mob spawners, and abandoned mineshafts.

Since Eaglercraft runs in your browser, the installation process differs slightly from the standard Java Edition launcher.

: A custom-made pack often used on servers to find faction bases and hidden chests. How to Download and Install

: Once it appears in the "Available" column, hover over it and click the arrow to move it to the "Selected" column. Click Done to reload the textures. Essential Settings for Best Visibility