No, Cycles Surface would only accept one of Emission nodule +Image_Map or Reflect nodule +Image_Map....
D'uh, what was I missing ??
Much exasperation, caffeine and unprintable epithets later, sorta dawned that perhaps the 'Blender' thing meant 'Combiner', rather than a 'me-too' of an arcane Blender / BfA (Modeller) specific feature...
{Face-palm...}
Upside, I've learned something new today...
![Image Image](https://www.posetteforever.com/files/posted_images/680/blendabc.jpg)
A tad fuzzy due 14 pixel-sample test render...
ps: May we have more than 10-character fields for image_source name, to better distinguish files ??