I came across this video by an English Tyler/fisher who was trying to find a way to tie a fly which would be accepted by even the pickiest trout. He relates that the standard ties he used sometimes had no success although the trout were eagerly taking the natural Duns he was imitating with standard representations.
At the end of the video, he shows the footprint of his new fly on the water which does look quite like the natural's footprint. He claims this style has produced very well for him when standard patterns havent.
It seems like a tedious tie, but the final result , I find, is quite impressive.
If you enjoy New and different styles, you might find it interesting.
https://youtu.be/NowJHG6bcd8
Here we s an easier version of Oliver Edward's Footprint Dun as tied by Hans Weilemann:
https://youtu.be/IfWVp6A19QQ