Christoph Werner shows how you can control attributes in multiple materials in Blender.
It is possible to control multiple materials all at once in Blender. Let’s say you have a metallic surface and a matte one. It is possible to control an attribute like the color value for both at the same time. 3D Artist Christoph Werner shows how to create that setup pretty easily.
Werner’s tip uses the group node in Blender which can work very similarly to an instance. Once you have made a group node, you can use it in more than one network. It’s a great way to add some common controls in more than one material so you can conveniently edit then in one handy place.