---
title: "Fire and Smoke Obstacle"
canonical: "https://documentation.chaos.com/space/LAV/1266844548/Fire%20and%20Smoke%20Obstacle"
format: markdown
---
This page provides information about the Fire and Smoke Obstacle, also known as Fluid Sim Body.


## **Overview**

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An Obstacle is an optional object that blocks fire and smoke in a Fire & Smoke simulation. Instead of passing through the obstacle, the fire and smoke collide with it and flow around it, much like real smoke spreading along a ceiling or curling around a wall.

Obstacles make a simulation look more realistic when the fire or smoke interacts with other objects in the scene, such as furniture, walls, or a chimney. A simulation without an obstacle runs as usual. The fire and smoke simply move through open space.

> ⚠️ Note that Fire and Smoke Simulation is an experimental feature.


## **Settings**

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See also:

- [Fire and Smoke Simulation](https://docs-chaos.atlassian.net/wiki/spaces/LAV/pages/376045781)
- [Fire and Smoke Simulator](https://docs-chaos.atlassian.net/wiki/spaces/LAV/pages/376045781)
- [Fire and Smoke Source](https://docs-chaos.atlassian.net/wiki/spaces/LAV/pages/1267007614)