Clarity is a resource pack for Minecraft that works to have "pixel perfection," and it does a good job. The textures are completely recognizable and similar to the original Minecraft textures, yet greatly enhance the look and feel of the game. It works for both survival and creative, as the textures remain similar enough to be easily recognized when playing the game. The skies are greatly improved as well so shaders are not necessary for your game to look great.
