I’d recommend looking at how Photoshop does it. Those asset marketplaces sell template images that contain a layer that maps the user’s image onto the template

I’d recommend looking at how Photoshop does it. Those asset marketplaces sell template images that contain a layer that maps the user’s image onto the template surface, like for t-shirts and other printing product mockups. https://creativecloud.adobe.com/discover/article/mock-up-a-t-shirt-design-with-adobe-photoshop https://creativecloud.adobe.com/discover/article/mock-up-a-t...