I have a model (High poly & Low poly) exported as FBX from Blender 2.78 to be textured in Substance Painter , the problem is whenever I bake the normal map for the model and use a metal material (basic material just metal at 1 and roughness at 0 ) it looks fine in the view port , but when I render an image (in Iray or Cycles) some artifacts appear .
I tried to increase the resolution for the baking as well as the final output normal map , but that does not help .
I created a simple scene to show the problem .
this how it looks in Substance Painter real-time view port vs how it looks in Iray & Cycles :
Thanks in advance .