Normal Map splits surface into squares I did not find this problem / question so far. I've got one mesh with multiple materials on it (Blender 2.8). One of them is a Chrome PBR material with a normal map. I set the material up as shown in the screenshot. The material and the reflections look right in the look dev mode. But when I switch to rendered view I get this squared reflections on my surface depending on the resolution of my mesh (subsurf modifier shrinks the squares but they will not disappear). Smooth shading did not help, all normals are in the right direction and the mesh is free of doubles. The problem has to do with the normal map. When I disconnect the normal map node the material's reflection is shown properly. But I don't know how to fix the problem with using the normal map. (Material: https://www.poliigon.com/texture/metal-chrome-001) enter image description here
Set you colorspace for the normalmap to non-color.