Drupal Import Commerce Product Display Multiple Images With Feed?
When using Feeds &amp; Commerce Product Processor you might want to to install Feeds Tamper as well. If the field that you are importing has multiple values you will typically have a delimiter (comma). I'd suggest using the explode function from Tamper to break the field into an array of values to import.  It might also help if you do a replace on the values you exploded to use the public file URI syntax (public://products/myproduct.jpg).