Mirror error

For some reason when i apply mirror to even a cube, it messes it up when rendered?!
Please help me get rid of this :smiley:


Overlapping faces/objects

Either the object you are mirroring has overlapping faces and/or you have mirrored the object on top of itself. Teh obejct mirrors itself around its origin so if you have the default cube and add a mirror modifier you will have the mirrored cube overlapping the original cube. http://www.blender.org/manual/modifiers/generate/mirror.html

No blend file supplies so cannot say which