For a configurable product M2E uploads images from the main (parent) and associated (child) products.
1) Description Settings
Main Image – uploads the largest image of your eBay item from the main (parent) product and adds small thumbnails to the image gallery from associated (children) products.
Picture Pack – displays larger, more detailed pictures (up to 800w x 800h pixels - 800 pixels on the longest side). This feature may come with additional fee.
Default Image Url – if a product does not have the Main Image this image will be shown instead.
Gallery Images – adds up to 11 additional images from the main (parent) product. They will appear as a small thumbnails under the Base large image.
Change Images for Attribute (only for Configurable products) – determines the option at which images should change on eBay.
2) Configurable Product Settings
Main (Parent) product images
The image shows how M2E will upload product's images according to the settings above.
Associated (Child) products
From Associated (Child) products images marked as Base Image will be uploaded. (Highlighted in blue).
Product 1
Product 2
3) Images on eBay