User blog comment:GandalftheTurquoise/Some news/@comment-26184570-20151008142701/@comment-25869554-20151008194724

Then you have to select it in-game. To do this, pause the game, select Options, then Resource Packs and click on the pack you want to use (which will be on the left) to move it to the right. Then click Done. It will take a few minutes but then the new textures (and/or sounds etc.) will be used.