It is designed to work with performance-enhancing mods like Sodium , OptiFine , and Iris .

Return to the game, hover over the pack in the "Available" column, click the arrow to move it to "Selected," and click Done . Why Use 4thful?

It is one of the most effective ways to make Minecraft playable on older laptops or devices with limited RAM. 16x textures? F4thful - Minecraft Resource Packs - CurseForge

Installing 4thful follows the standard process for Minecraft resource packs:

Drag and drop the downloaded .zip file into the folder that just opened.