Hi @sergey.lerg,
Well, shaders are not for me and I will probably NOT crack them.
I can’t even reproduce this simple code from the Book of Shaders without errors.
But then, shaders might even not be ideal since my project is made up entirely of Gui scenes (and finished apart from the rounded corners).
If only the smooooooooth curve of the shader you found for me were not so beautiful… Ah, well.
Anyway: I had a lot of fun following @Pawel’s excellent tutorial Shaders for beginners and the Shadertoy tutorial.
I have now a blinking dog that sometimes gazes at the stars - he is so cool!
So, I will mark this thread as more or less solved.
Many, many thanks to (in order of appearance): @totebo, @MasterMind and @sergey.lerg. It was a pleasure to learn from you, and I learned a lot.
Till next time!
Many Greetings
Brigitte
@britzl, I forgot you! How could I? Thanks to you as well!