Reply To: Realistic Industrial Environments Course: “Principled BSDF” Node’s “Specular” Socket Input without Effect?

[spikeyxxx]

@duerer you are absolutely correct, albeit taking the long way in your explanation 😉

The short version:

multiplying anything by 1, doesn’t change anything, no matter what the factor is.

In your calculation: color2 is 1, so: (fac*color2) is just fac and (1-fac) +fac is simply 1.

So you can save yourself a Node 🙂