I had an even harder time finding a background for a portrait of the Mavka fairy I first set up for A Frost Fairy’s Work is Never Done, so I ended up using something simple in hopes that Painnt would make something interesting out of it, and it sorta did. Some of what I loved about the materials for the dress and wings got lost in the process, but I’ll live 
(I put the original render at the bottom of this post, if you want to compare.)
Rendered in March 2022 using Firefly in Poser Pro 11 for Mac at 1800 × 2250 pixels. Art effects applied in Painnt.
SCENE CREDITS: Terradome2.
CHARACTER CREDITS: Mavka figure and Becky Hair by Smay; Snow skin for Mavka by angie; Ice Fairy outfit by 3DTubeMagic (w/ custom mats).
