If you're looking to create strong #geometric patterns with #gimp you might consider experimenting with the #qbist #filter as a starting point.
Some hints : Combine filters Think about XY co-ordinates. Don't just pixelize or shift or oilify.
|Rainbow Bridge Copyright Julie Vaux 2017|
This is Rainbow Bridge one of my latest designs on https://www.redbubble.com/people/scholara
It started as an image generated by Qbist in Gimp.