   Problem with per pixel lighting - sharp edge
  I use CG Shadres + OpenGL and I have problem with per pixel lighting in my app. I have visible sharp edges in lighting model. I select this example edges in red lines.Good (unvisible sharp edges) without lighting:http://www.imagic.pl/public/pview/71018/01.JPGBad (visible sharp edges) with per pixel lightinghttp://www.imagic.pl/public/pview/71019/02.JPGWhat is wrong? Shader? Shading mode?...   
  You would need to examine the normal map and see if vectors at these coordinates are not poiting the opposite way, which would cause such seaming. Also, there might be normal map alignment problem around these faces, shifting them left or right, and creating seams.Check with per-face or per vertex lightning how it looks, the first screenshot you have provided looks like flat shading, so no seams will be visible.Best of luck!   