> For the complete documentation index, see [llms.txt](https://docs.scenic.tools/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.scenic.tools/guide/actors.md).

# Fixtures

Fixtures are objects representing individual autonomous agents in Schéma.

They can map directly to physical lights, smoke machines, objects in the visual output or just be used internally in the Schéma program (Virtual).

Each fixture contains and processes its own [Block Stack](/guide/blocks/stacks.md).

Fixtures are placed in 3D space by double clicking and selecting in the [Schematic view](/guide/views/schematic.md).

![](/files/-LeHSFkLy33o6Zo8EPQ2)

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