People had to submit light, dark , horizontal and vertical versions.

Finalists announcement here : https://discuss.kde.org/t/finalists-announcement/7862/10

Some other great submissions here : https://discuss.kde.org/c/community/wallpaper-competition/26

Thanks!

Glad I could help. I’ve also seen some DIY projects, but not sure how hard that would be.

Something like this?

https://www.getpcpanel.com/shop

Not one knob but you can adjust multiple sources with hardware knobs.

Or maybe I don’t understand what you’d like?