[Nanomani]

dumb question ?

xml:
<visible>!String.IsEmpty(Skin.String(fanart.fallback.music))</visible>

<visible>String.IsEmpty(Window(Visualisation).Property(ArtistSlideshow.Image))</visible>

it is the same with this ?

xml:
<visible>!String.IsEmpty(Skin.String(fanart.fallback.music)) + String.IsEmpty(Window(Visualisation).Property(ArtistSlideshow.Image))</visible>

or this

xml:
<visible>!String.IsEmpty(Skin.String(fanart.fallback.music)) | String.IsEmpty(Window(Visualisation).Property(ArtistSlideshow.Image))</visible>

or other ... ?

thanks a lot

EDIT:
nothing usefull here :
https://kodi.wiki/view/Conditional_visibility

[Hitcher]

The second one.