Fibonacci Ratio - Aurea Ratio

[rich2005]

A couple of oldies here: Just tried again and they do work.

https://www.gimp-forum.net/Thread-Dynami...9#pid14969

Edit: ..and from above that Ofnuts golden spiral plugin applied over an image.

   

Edit: Inkscape ? For version 1.3.x it is Extensions -> Document -> Guides Creator and in the Guides preset drop-down there is Golden Ratio and Rule-of-third.