The GTK3 version of PhotoFlow is still rather unusable simply due to the lack of a proper UI theme. Personally I am a complete theming noob, and so far I could not manage to achieve something decent.
The best-looking result I could reach uses a 1:1 copy of @TooWaBoo’s “TooWaBlue - Dark” theme for RT, however there are several things that could still be improved, as one can see for the screenshot below:
For example, the background of tabs and text entries is too light, and generally I find the UI elements a bit too big… for comparison, here is the current GTK2 look:
If anybody volunteers to give me some help, I’ll give more details on where photoflow looks for the theme files.
Thanks a lot in advance!