Mirrored object not perfect aligned after adding mirror modifier I'm trying to mirror my character but the alignment is not perfect. First of all I have configured the origin point doing the following steps :

1) in edit mode I have placed the cursor at the bottom of the character with Shift+S and then I did Cursor to selected

2) in to Object mode I did Ctrl+Alt+Shift+C > Origin to 3D Cursor to update or change the object origin to the location of the 3D cursor

But it didn't work, as you can see from the attached picture, the alignment is not good. Why?
If the vertices at the edge of your model are not aligned with mirror axis you'll have gaps.
To align the vetices do thei:

Deselect all the edges and select only the ones that form the edge of the model (Alt+RMB), and then scale those vertices to 0 (press SX0).