I ran an old problem here (see an old post of mine dated back to 2017) - I recently switched from Blender Version 2.79b to 2.8 respectively 2.9...
When modelling some glass now for a new gold decal/foil sticker design, my render (Cycles) came out the way as shown below! Superstrange with a ghost picture. The glass is supposed to only show the decal to a restricted area (like the complete frog you can see...).
This is like what I want to build:
Oh, of course, I UV-unwrapped the section I wanted to put the decal on - I did it a lot successfully in Blender 2.79b, you know...:
But this is the Render outcome:
And this is the node setup I built and used:
And here's the "Frog Mask" I intended to use for the gold foil material - Black and Transparency:
The glass should be clear except for the centered complete frog design. Oh - The Frog of course is not yet of a gold material - I just wanted to get the setup right first... But like 6 hrs up until now made no change...




