Hi @Feanne ,
I updated your doc.
I guess that the misunderstanding was due to the name…
Print is both the table AND the column
So in your table you had to write
thisRow.Print.Print
the first one denotes the Print column of Garments table (which contains a Print lookup row), the second is the Print column of the Print table, that contains the image.
I hope this helps.
Cheers!