Feeds - import multiple images
Use Feeds , Feeds Tamper to import field with multiple values
use sql to group multiple value with separator "|"
multiple values field will look like this
SELECT p.program_id , GROUP_CONCAT(i.img_url SEPARATOR '|') as uri , GROUP_CONCAT(i.img_caption SEPARATOR '|') as title FROM event as p left join images as i on p.program_id = i.ref_id group by p.event_id order by p.event_id limit 0,2000
Feed Tamper > set the field with multiple values with "explode" rule with "|" as separator.
to import image with title description , alt description
csv will look like this
img path img title img alt
xxx|xxx|xxx xxx|xxx|xxx xxx|xxx|xxx