Some mods may be bigger expansions, while others add more settings and options to optimize the speed, graphics, or gameplay of the game. Most mods add content to the game to alter gameplay, fix bugs, change the creative feel, or give the player more options in how they interact with the Minecraft world. With different 'shaders', Minecraft can look very different from Vanilla. The 'OptiFine' mod that supports 'shaders' in-game which only changes the look.
