I made an array of rectangular prisms and gave them three or four simple deform modifiers till I got something I liked shape wise then made a color ramp and voronoi texture to get the colors
I was working on one my projects when I stumbled across this fantastic internal addon by mistake called “Extra curve Objects”. Its fantastic. Gave it a few hours + volumetrics+ particle system and made this !
Cycles produces even more cool results but I didn’t have the time for that.