For products with a separate background layer (e.g., gift bags, paper cups), when the non-background layers have a transparent background, images on the background layer don’t appear to be rendered in the preview image that’s shown next to the designer’s name near the right side of the product page.
This is a gift bag example:
The “Front: Images and Text” layer has a transparent background, and it includes some images and text that are mostly colored white.
The “Background: Images and Text” layer contains some images that cover the entire layer.
In the preview image next to the designer name on the product page, the “Front: Images and Text” content appears to be rendered, but the corresponding “Background: Images and Text” image isn’t:
In that case, there’s nearly nothing displayed, since almost all of the text and images on the front layer are white, and the page’s background is white, too.
Here’s another example, but with a paper cup:
https://www.zazzle.com/50th_birthday_fun_graffiti_inspired_rainbow_50_paper_cups-256727375574360709
Adding the background image to the front and back layers, and leaving the background layer empty and transparent, for example, isn’t really a solution, since this can lead to white spaces on the sides of products like gift bags and paper cups.
Adding the background image to all layers doesn’t necessarily work, either, such as for background images that don’t tile cleanly.
