A single node that affect multiple meshes

Question

I have a lot of meshes of hair ( with their own node setup/uvs/textures/materials ) that forms a complete haircut.

How can i make a node , like a color ramp , that will affect all these meshes at the same time?

Answer 1

just for an example, you can put nearly everything in your node group:

Add these two nodes:

Select both,

Choose "Make group"

Connect color to group output.

Press Tab.

Select your nodegroup and another color, add a mix node and connect like this:

Now add your nodegroup to all your materials.

If you change your nodegroup e.g. the scale, all materials will change as you want.