> For the complete documentation index, see [llms.txt](https://docs.variant3d.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.variant3d.com/3d-content/tags.md). # Tags Variant works on the concept of ‘tagged’ objects in a file. You can tag meshes or materials with names and use them to make meshes visible/invisible, and assign tagged materials to tagged meshes. Planning your tags carefully up-front will help reduce the time needed to create 3D models, minimize the download size for the user, and simplify adding future variants. ### How to add tags Tags are set in your preferred 3D editor, by editing the name fields of 3D objects. We show that a word is a tag by wrapping it in the special characters: “V\[ ]” For example, if you had a 3D mesh named “**armchair**” you could tag it as **CHAIR** by changing the name to: “**armchair V\[CHAIR]**”, or simply “**V\[CHAIR]**”. It doesn't matter if there's other text in the name - the only thing that matters is that our tag-name **CHAIR** appears surrounded by **V\[ ].** ![(screenshot from Blender)](/files/-MYdxSvIm_LY7oWMTcT7) Tags can only contain numbers, letters and the underscore ‘\_’ character. Tags are case insensitive, so there’s no difference between ‘Chair’ and ‘CHAIR’. However, we recommend using uppercase to make tags stand out from other text in the name field at a glance. --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter: ``` GET https://docs.variant3d.com/3d-content/tags.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.