Hi, 1 year later, I use this forum to document my discovery and to help me in the future so I archive my material here.
I use Power(X, 0.4574), then no need to uncheck the sRGB all the time, otherwise you may get confused when there are many textures and you forget one of them.
I transform the normals with the invert of the scale: Multiply(N, Divide(1, Scale_XYZ)).
Here is the result:
