This picture demonstrates the use of ‘a tag’. Just by changing a tag you can see different pictures. The person in this picture wears now the tag ‘honor & steel’ so in the gallery you see pictures made by the artist for this theme.
The technology “TAGREZ’ (take a tag to rezz) was published first in 2008 at the piek time of Second Life. Later on it became a technology used in many worlds. The code for TAGREZ is published in many ways and on various plattforms. Feel free to ask in case you are interested to get one of the trusted sources for your own project.