Mirror Modifier Texturing Painting Problem I was Modeling a Low Poly Car using mirror Modifier. Sides of the car shares the same UV's. After texturing, a line appears to be in the middle of the model.  

Question:
How to remove that line ?
Double geometry may cause this.


Select your object that has these strange lines in the outliner.
Go to edit mode.
Press 'a', to select the entire object.
Press 'w', to bring up the pop-up menu.
Choose 'remove doubles' from the menu.


If it's duplicate geometry, this will solve your problem.