I know from days of writing VBA code that that code in its entirety can be copyrighted. Your loom, Bill, would fit into a similar category. Yes, it's math formulas, but VBA code is basically Basic code arranged with a specific purpose in mind. Your math formulas are arranged in a Python script with a specific purpose. Whether you wish to copyright this and how stringent you want the copyrighting upheld (what you will and won't permit within the terms of the copyright) is pretty much up to you. Personally, I like the terms of Open Source software copyright, which I feel you've tacitly applied to your shaders and code. Basically: free, use where and what you want it for, don't claim as your own. Makes sense.

Indeed, Bill, when you handed me the essential recipe for what later developed into the shader in use for a product I'm hoping to put on the market in the very near future, you - in my view, anyway - retain copyright to that shader... and credit is given, in the Python script. Not that you'd want ownership, necessarily, but you basically gave me the darn thing so it is pretty much yours. Just like when I see a brilliant shader set (tree?) and re-create it in Python, I still see it as belonging to the person that originally strung those nodes together to achieve that effect, so in my view I should at least give credit to the originator, depending on how elaborate the shader was and how unique it was, I guess.

What we've got now is excellent opinions on what's permissible. Depending on what 3D artists use as their copyright guidelines - whether the OS movement matrix or some other model - I'd like to propose that if anyone has anything salient to add to this discussion, please do so.

Here's what I'd like to do - sort of to kick this off: submit to the freebie area a GCed version of a popular V4 clothing item. So, my question is:
--Is the freebie area the appropriate venue to do this?
--Does Rendo see potential problems with this?

Opening the floodgates....

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