Copying materials from one object to another is easy, but what if you want to copy just part of a material from one object to another? Here is an easy way.
- Select one object. Open up a rendertree.
- Select the other object. Open up another rendertree.
- Draw a box around the nodes that you want to copy.
- Hold down control and alt, click the nodes and drag them from one rendertree to another.
- Connect your newly copied nodes and your done!