I don't understand how this was made - but the end result looks great, very striking! I love the patchwork of colours and the hinted shapes underneath - makes a good contrast to normal 3D ( I wouldn't have guess it used Curvy to look at it )
I used image inflate to make the girl. Then drew a huge lathe and textured it with a grassy/rock texture, copied it and pasted the copy at angles to the original lathe to make the ground. Made several copies of the girl after doing the painting. Then took a screen cap and went into PSPRO added a sunburst and then an old KPT effect to make it look kind of melted then made tweaks and adjustments to colors....
But the subject of the art was indeed realized with Curvy.