We are migrating from Omeka Classic to Omeka-S.
In Omeka Classic, I typically uploaded metadata with files using the CSVImport plugin. During item creation, multiple derivative images were also created.
I am using the Omeka 2 Import module to migrate the data to Omeka-S. From what I can see so far, each item retains a link to a fullsize image file. But, I do not see any derivative image files. How can I create thumbnails in Omeka-S? Is it necessary to use the Create Missing Thumbnails module or is there some other method? Am I missing something obvious?