How to create such images in Photoshop?

Question

Adobe Photoshop

Good afternoon.
Somehow I understand)) that this is the result - chandeliers ...

but still ....
How to create in Photoshop
1) First, the Shape, what is in the foreground?
If you work with a pen and then fill it with a gradient (or a map), then at first the edges of the figure will not be smooth and the "connection" (the beginning of the contour and the end) will also be noticeable.
2) And how then to cut this figure into shreds (figure in the background)?
Thank you!

Answer 1