This simple to use but powerful set of nodes ideal to create textures in Blender node editor.

"Normal Mixer" Node:

Allows you to mix normal without losing details, it avoids all the problems from "normal map overlaying" and give you a powerful tool for your PBR workflow. You will be available to combine multiple normal maps and use those in Cycles or EEVEE, also you have a special output to bake the combined normal to be used in other 3D applications.

"ID Mask" Node

This Node allows you to use a mask (colour code) image as a mask for your node tree. Just pick a colour from the image and adjust the tolerance. Notice that blurred colours will not work well.

Features

• Combine multiple normal maps in Blender node editor.
• Use color mask images to create mask.Bake the result map to be use in other applications.

ChangeLog:

v1.01 

• Fixed "NM_Bake" output color correction.
• Fixed factor "fac" slider to use the entire range, from 0 to 1.
• Improved quality of the normals combination.

v1.02

• Name of the tool changed to "NMX Node" to NMX "Studio".
• Added new node "ID_Mask".

Thanks for your support, with your help I will make this tool more powerful in future releases.