I found this to be interesting read http://www.cement.org/docs/default-source/fc_concrete_technology/durability/is536-types-and-causes-of-concrete-deterioration.pdf?sfvrsn=4
@iam717 : this is unrelated. @sbstndc : unlike any other type of texture, the colors in a tangent space normal map depend completely on the orientation of the UVs. Make the following test now : take all your UVs, rotate them by any amount of degrees, and bake again. All the colors (except the default blue) will be…