1. A computer system comprising: at least one computer processor that is configured to provide a host application website that: displays articles from a plurality of retailers; allows an on-line viewer of the host application website to access the displayed articles; in response to access of at least some of the displayed articles, places accessed articles in a shopping basket; facilitates purchase of articles in the shopping basket; provides a merging option; in response to selection of the merging option, merges image data associated with at least one of the articles in the shopping basket with image data associated with a structure, thereby generating merged image data; and provides the merged image data to the on-line viewer.