Here’s something I made as what will be partly animated, however I rendered a 4K wallpaper from it as well.
Simply a displaced icosphere, with a blend of different colours as the material.
Render time 25 mins on an i7-4790k. LuxRender 1.7dev
High quality image is here: https://1drv.ms/i/s!AnYenLI8umY-jNgdDxY8kPyl15iy6Q
