Select picture in parent HTML (WooCommerce) and display it in 3D showroom

Dear community,

I’m completely new to Verge3D. I really appreciate this tool, although I haven’t digged very deep yet. But what I saw so far is great!
Sorry if this post has been going into the wrong forum.
I’m planning to spin up a WooCommerce shop offering images/posters. These posters I’ll offer in different sizes. My idea is the user to select a poster from the product page in WooCommerce. The selected image is then loaded into a nice showroom which will be a scene modelled in Blender. The image will be applied as a texture to some frame (I’m studying the Custom Image example for this use case). It will be even possible to switch showrooms and to take a look at the image in different environments.
The basic challenge is to detect which image has been clicked in the Product Page of WooCommerce and then load that picture as a ressource from a folder on the server and apply it as a image texture to some Blender plane. Second challenge is to have a dynamic background. The raw image will be a PNG with a transparent background. My idea is to allow the user to change the color of the background and even apply gradients. Is this possible, I mean can I generate a procedural texture on the fly to be the background for a transparent PNG dynamically?
The configuration (image, size, background) chosen by the user is sent to me via email, processed by a Raspberry cluster which renders the final image according to the metadata received in the mail (recipient, image, size, background) and finally sends it to the printing studio.
Is this a feasible scenario, any tipps? Sorry for the longish question…

Thanks in advance. Any help is really appreciated.

Cheers,
Peter