Board Thread:Questions and Answers/@comment-26783986-20160115032211/@comment-79.195.229.179-20160115173914

It's your Settings. Open the Inventory and press F3 ingame, there will be a Debug Console with Buttons. Increase the Texture Quality from there! Decreasing Shadow Cascades helps with Performance, should be on the same Menu.

You need to open the Inventory, because it won't allow you to click anything if you don't.