This works pretty well:
<ImageFill File="Assets/picture.png" StretchMode="UniformToFill"/>
But, if I try to use some js-string to get the path, it isn’t working:
var picture = "Assets/picture.png";
.
.
<ImageFill File="{picture}" StretchMode="UniformToFill"/>
In this version, fuse tries to lookup in “C:\Assets\picture.png” and not from its current path…