Thank you Anna for your feedback. 
I really appreciate any positive feedback about my work.
Of course! 
With a lot of effort and a long testing procedure, I developed a standardized process containing filters, their parameterization and a few manual corrections. With this procedure, I was able to create an individual wallpaper based on a defined color palette. I applyied this technique on my other two sumbissions ALYNA and COPPAR as well.
In my provided .xcf source files you can find each step with an extra layer. So you can see the changes and the process, starting from a blank canvas.
If you want more details or even my .log file with all filters, parameters and corrections, just let me know. I would like to ensure transparency and follow the idea of open source. Even in my design process.
Love and Rock’n’Roll !
Tim