Knotwork is drawn the way the old scribes did it: start from a plain plait, then add breaks that turn the strands back. Click a dot to add a break, click again to turn it, a third time to remove it. The diamonds on the borders add edge points: the strands run out past the border and back, making a pointed edge. User manual
Drag to turn, scroll to zoom. A preview: Blender builds the exact model.
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crossinghorizontal breakvertical breakedge point
Settings for make_celtic_band.py
Paste these lines into the script just above the derived sizes comment line (after all the other settings), then run it. The ring version always wraps, so it uses the ring band layout.
Share link
The link opens the ring in 3D only: not the designer, the weight or your price. It holds the design as it is now, so later changes here don't alter a link you've already sent.
This page is open from your own computer, so the link only works here. Make the link on the live site to send it to someone.