Its normalization depends on many factors. Coordinating other lights and hdri as well as colors and blurring and viewing angle. All of them are effective in making it natural.
Image noise has many factors. config, rendering settings and the amount of time you spend on rendering. Using denoiser and optimal settings and scene management can increase the speed and quality of your rendering.
@@MIMVizStudio in the normal map (in all the materials that you done) you dont “add gamma to imput” and “flip green” in the node options…normally everyone do that or i think so until imsee your tutorial