Oh, okay. Well, I'm using an actual HDRi (had to load it up in QtPfsQUI to find out what the dimensions were so I could put that in the Render section, Dimensions area under resolution... found out from a tutorial somewhere you have to get those dimensions right or the image would not show up as background: it would be a blur.

Shader for World now looks like:

Monterey/Mint21.x/Win10 - Blender3.x - PP11.3(cm) - Musescore3.6.2

Wir sind gewohnt, daß die Menschen verhöhnen was sie nicht verstehen
[it is clear that humans have contempt for that which they do not understand] 

Metaphor of Chooks