Ok. Several days later…
I’ve followed the suggestions you’ve offered AmberV, but I’m still getting null results…
If I use this text / syntax (i.e. [text][imagename.png])
> *Facilitator: unless everyone has a textbook, draw [the model][tri-foldnumbered.png] for the group, making sure each circle overlaps the others.*
I get this LaTex output:
\emph{Facilitator: unless everyone has a textbook, draw \href{tri-foldnumbered.png}{the model}\footnote{\href{tri-foldnumbered.png}{tri-foldnumbered.png}} for the group, making sure each circle overlaps the others.}
\end{quote}
I.e. it treats the link as a footnote.
If I use this text / syntax (i.e. text:
> *Facilitator: unless everyone has a textbook, draw [the model](#tri-foldnumbered.png) for the group, making sure each circle overlaps the others.*
I get this LaTex output:
\emph{Facilitator: unless everyone has a textbook, draw the model (\autoref{(null)}) for the group, making sure each circle overlaps the others.}
\end{quote}
Which unsurprisingly results in the “…(??)…” final pdf output previously referred to.
(…Although, if I manually insert the image filename in place of
(null)
… presto, it all works. But why is MMD not supplying the image filename? The MMD syntax would seem to be correct, since it is calling the
\autoref
statement…?)
If I compile for MultiMarkDown directly, based on the above syntax, it outputs the following (I’ve included the image for reference)
[code]![Tri-fold Model][tri-foldnumbered.png]
Facilitator: unless everyone has a textbook, draw the model for the group, making sure each circle overlaps the others.[/code]
So, I’m stumped. I’ve gone through the Scrivener manual, the MMD manual, the ScML Guide1 etc. as linked from this forum.
As an aside (sort of) I can’t find anywhere that DEFINITIVELY set out the correct syntax for linking to an image in MMD 3.x.
Help, would be greatly appreciated! 
