Cycles Texture looks odd on the normal side I have a texture added to some planes (cube with four sides deleted) and there's an odd problem.
some of the planes seems to have the texture on the wrong side of the normal and catch the light in a different way as you can see in this image  
on the left side of image everything looks right all walls catch the light in the same way but on the right side the wall won't show the light on it unless I flip the normal so the normal points to the inside
they are built with a copy of the same block and all of the normals point in the same direction.
is it possible to apply the same material inside out to another object?
looks like I forgot to mark this one as solved, to solution was choosing non color data for normal image in material / node editor