I did try the MixRGB but the render was black no matter what the Blend Type - when I went back to using the Mix I got what you see here.
There’s a part TWO to this question because it’s for the sake of landscapes. When Displacing, can that Image Texture or Noise Texture (for example), be linked to the Image Texture or Noise Texture that controls the Factor for the Mix Shader?
The desired effect is that when the Displaced peaks and valleys change, the Mixed Image Textures change - useful for footprints appearing or altitude controlled Images, etc.
I see the Node Tree Type for Textures, but never see the Texture that drives the Displace Modifier. Is this my err or something coming?