How to Fix Broken Blender Mirror Modifier

Learn the most common reason why the Blender Mirror modifier appears not to work and 2 easy ways to fix it. Details below... It&common to not see a visual change when applying the Mirror modifier to an object in Blender. This is particularly the case when dealing with symmetrical objects such as the default cube. The origin of an object, represented by an orange dot, is the point about which the Mirror modifier acts. By default, an object and its origin move together. An object and its origin need to be separated for the Mirror modifier effect to be seen (this is ignoring the Mirror Object option). There are many ways to do this including... Edit Mode When in Edit mode, an object&origin remains fixed. As any transformations, such as move, will still move the contents of the object, separation can be created between the object and its origin. Object Mode In the upper right corner of the 3D Viewport is an Options drop down menu that contains a "Transform - Affect Only - Origins" checkbox. When active, any transformations, such as move, will only target the origin. Don&forget to uncheck this option when done with it.