We sell jewellery and want to create silver and gold collection pages. Almost all our products have a silver variant and a gold variant. However when I create a Silver collection page, by using the condition that the "Variants Title Contains Silver", the products which have a silver variant are included which is great but the first product image is shown, not the silver variant image.
How can we change this so that a given variant image, or even just a given image, is used as the product image on a given collection page. Ie so we can show only silver images on our silver collection page?