Pia: and following up on your post in your thread for more input on this third painting:
The background: About an eight of the canvas, was filled with tube paint, mostly blue with dabs of other color in select spots, and worked meticulously with various knife settings and the eraser to form an area that has the basic texture and distribution of color you see in the final.
Then I used the clone tool to mimic the area over the canvas.
Then I went back in with the knife and eraser over the entire field to make each area unique while uniformly tied together in what is hopefully a pleasing whole. Yes, doing it again is straightforward, but you do have to "do it right" give or take.
The artifact is built first with glitter trapped in a "select" area on a separate layer and formed with the blur blender, a technique for getting these 3D looks.
Stickers were used to build design into it, and the eraser used to carve out the channel and nuance its form.
The airbrush was used to create some shadow and some subtle color-variance in the background pattern.
Then merge the layers.
The knife on various settings was used for final touch-ups including blur in select spots, and some judicious work with the eraser. This is a fairly easy piece to develop. You just have to follow some methodical steps and it comes out fairly easy. These are fun to do because you can take them in so many directions. Often this would be a starting point for a more complex painting. But I liked how this resolved so left it alone. Thanks a lot for asking.