I finished making a texture and normal map in Zbrush, then I put them on my model in Blender. I thought it looked fine until I noticed the shadow on his back wasn't smooth, and it was split. It's at the edge of the UV on his back. This is the only place where the normal map isn't smooth. I switched it to non-color data in blender, but it didn't change anything. Does anybody know why the normal map in this area wasn't smoothed?