Is there any reason why I cannot set a product attribute with type 'Media Image' to be used in product listing?
When I create an attribute from Stores->Attribute->Products and select the Catalog Input Type for Store Owner to be Media Image the Frontend Properties tab disappears completely.
If I create the attribute like that and then change the value for the field used_in_product_listing in the catalog_eav_attribute table for the attribute I just created to 1 it works just fine. I have my attribute loaded in the product listing page.
Sometimes I may need an additional image attribute in the product listing. I cannot do that from the UI and I see no reason for it. A real use case: I want to have a rollover image. When hovering the product image I want to see a different image (with the backside of my product for example).
This problem exists in Magento 1 also. I hope it will be tackled at least in M2.
And while on this...please change the label of the attribute type field. Catalog Input Type for Store Owner sounds scary. Attribute type sounds more friendly.