This is a case where you need to call a macro inside a macro, because you
want to embed $photgrapher$ and then get the result and embed that. So
there's two levels of concatenation.
This works for me:
\define lightBox(img, caption, photographer, template)
<$macrocall $name=lightBox2 img="$img$" caption="$caption$" photographer={{$
:/_dictionary/photographers##$photographer$}} template="$template$"/>
\end
\define lightBox2(img, caption, photographer, template)
<$button message="tm-modal" param="$:/_template/lightBox" set=
"$:/_state/currentImage" setTo="
img: https://raw.githubusercontent.com/magev958/Images/master/$img$.jpg
caption: $caption$
photographer: $photographer$">
[img [https://raw.githubusercontent.com/magev958/Images/master/$img$.jpg]]
$photographer$
</$button>
\end
<$macrocall $name=lightBox img="Motovun Jack.svg" caption="Myphoto is nice"
photographer=tom template="stuff"/>
You of course would call whatever your photographer's short name is ;-)
-- Mark
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