I was wondering: is OH creating / maintaining new icons, which fit the existing theme?
Maybe there is a graphic artist amongst us, who could develop / maintain an ever expanding set of icons.
No, I am not a graphic artist, otherwise I would have a crack at it 
Here are some links for icons:
Thanks…
I was more thinking along the lines of the existing icons theme being extended; e.g. same size, colour, style theme.
I can guess the answer: NO
Do we now who did the initial ones?
Or where these came from? Are there more?
The KNX icons are more pictograms than pictures.