Wierd normal map problem

[eugenefoo]

Hi guys,
Does anyone here know what is causing this artifact to appear after I mirror and weld?

Whats weird is that the artifact appears not at the middle seam line but at the side. I'm really very puzzled by this and hopefully you guys are able to help.

Have tried the following:

-using symmetry and not mirroring
-fixing the Red and Green Channel of the normal map
-moving the duplicated side UV by 1.0(offsetting) before baking

http://i173.photobucket.com/albums/w69/significantZ/mirror_normalmap_problem.jpg

[Ben Cloward]

This problem is happening because the UV coordinates in the middle are welded. Open the UV editor, break the verts in the middle along the mirror seam, and then offset one set by one on the U axis.

It's OK to weld the verts, but it's NOT for the UVs to be welded along a mirror seam.

[eugenefoo]

Thanks Ben! Fixed. Now why didnt I think of that. Gosh