GTK3 settings in other WM/DEs
 

Has anyone yet found a way to theme gtk3 apps under other WM's or DE's, without having to install and run Gnome's settings Daemon? Ever since the gtk3 versions of some apps came out, they've been using the bland, boring and ugly basic themes in my openbox session, and no amount of hunting has turned up anything to fix this yet.
Would avoid gtk3 entirely, but irritatingly I've yet to find useful alternatives to the remaining gtk/gnome apps that don't rely on it.

You have to create the ~/.config/gtk3.0/settings.ini
Example:
[Settings]
gtk-theme-name=Adwaita
gtk-icon-theme-name=Humanity
gtk-cursor-theme-name=Adwaita
gtk-fallback-icon-theme = gnome
gtk-cursor-theme-size=0
gtk-toolbar-style=GTK_TOOLBAR_BOTH
gtk-toolbar-icon-size=GTK_ICON_SIZE_LARGE_TOOLBAR
gtk-button-images=1
gtk-menu-images=1
gtk-enable-event-sounds=1
gtk-enable-input-feedback-sounds=1
gtk-xft-antialias=1
gtk-xft-hinting=1
gtk-xft-hintstyle="hintmedium"
gtk-xft-rgba="none"

Yep, done that. Seems like it doesn't get sourced outside of Gnome though.