I am not yet allowed to add a comment (or question) to the mentioned thread. Therefore I have to create a new question.
I read the fantastic tutorial of cegaton how to add transparent images on top of materials (see link). This works beautifully in v2.79b.
For some reason, this technique does not seem to work in Blender 2.80 anymore (I am using the very latest Mac version from Dec 20). The transparent image is also shown on the part of the mesh, which is not UV unwrapped. Is this a bug in v2.80? Or does v2.80 require a different approach?
What is really odd is the fact, that if I open in v2.80 a file created in v2.79 created, it shows up correctly.
Thanks for any advice! Chris
Edits: screenshots and link to blender files added