Very fine work.
If it possibile tell us the process that you followed.
Thanks for asking, Taliesin. I’ll be happy to share.
The two key components were a very good OOO Windsor & Newton brush, and a slow, patient approach.
That said, I start by painting the base uniform color between the lines of braid. I’ll paint a darker shade of that color under each line of braid to create a shadow and add some depth to it. I’ll come back later in the process and add a lighter shade to these strips in the upper chest area, and any areas that stand out and would catch more light.
I start painting the braid itself with a dark brown color (if you want actual colors, I can provide them). I then paint over it with my base gold shade, leaving a tiny strip of the brown showing at the top and bottom of the strip of braid. I then add a highlight strip of lighter gold across the top of each strip of braid, and the shadow line gown the middle with thinned brown. I’ll add additional highlights if there are folds or other areas where a section of braid catches additional light.
When I have all of this about the way I want it, I then come back and clean up any crooked lines or mistakes. The little tiny loops of braid were painstakingly painted with that good OOO brush. Some cleanup was required on those as well.
I hope that some of this makes sense and is useful. The shading and highlighting are important, but are overlooked by many painters.