So, generally, when I connect Mix Shader directly to the material output, everything seems fine.  But this node won't' connect to BSDF's Base color. Also, there's no blending option in Mix Shader (probably because I'm on a newer version of Blender)

Probably I have to create another node or use a different approach?

Man, this video blew my mind. thank you Kent!

Question - if you were to take this asset into Unity, can you reuse the shader somehow, or do you need to recreate it? What about when uploading to Sketchfab?

Thank you,

Things were going well and then the treasure chest went bright pink and has stayed that way. Previously it had been just fine...so I turned something on/off somewhere, by accident. Unhooking the nodes back to where they were producing brown and grey, dirty vertex paint, etc., just fine, didn't help. Started getting pink at the time I started with the Noise Texture node. My nodes, connections, and visible settings match those in the lesson. Any suggestions? Thanks. (Loving the lesson by the way.)

theluthier  At video time I noticed that the material output socket is colored green. I presume that must take "shader" information.

Is a green shader node a combination of all other nodes' info (color, vector, b&w info)? Or is it that and something more perhaps?