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What does the "before" image look like.
Impossible to tell...... but it looks like a kaleidoscope effect. I think I have one somewhere.... let me look for that........
Ok, I think I got it with 2 filters.
The first image is the seamless texture; the second image shows the "Polar coordinates" filter aplied (note the thin white line which indicates the left side of the texture touching the opposite end); the last image shows the twirl filter applied.
This is pretty close, please comment.
Your right it's not a kaleidoscope filter. None in my collection worked.
Your findings are sound but I don't know. It's quite hard to say until we can find or reproduce the original tile.
As an experiment, I tried reverting your last image back to the second image you made with the twirl filter but in reverse and I came up with this....
View attachment 2844
as you can see, it reverted.
But with the image in question....
View attachment 2845
No matter what I do to get the red guide line straight, I don't get any pattern at all. It distorts even more. Most especially the arcs going the opposite way of the twirl.
I'm not saying your wrong..... I might be wrong with my reverse engineering...... BUT....
This is a doozy... I would love to know the answer to this. Must experiment with a different approach.