Hey, all.

I'm looking for a very specific wallpaper for quite some time. A while ago, I saw a listing on AliExpress for one of those large mousepads with this image, but it's long gone. I'll try to describe the image, bear with me.
It was somewhat similar to pic related, except:

1) the girls all had their backs to the viewer;
2) each girl represented one hue on the colour spectrum, their hair and swimsuit matched. Them standing side by side formed a beautiful colour gradient, like a rainbow;
3) the background was pure white;
4) there were 7-10 girls on the picture, not sure how many.

I have no idea from which anime/hentai they were, I didn't recognise any of them. Might have been a one-off by some artist.
If you have it, help an anon out please.

Also, swimsuit/group general.