---
title: "Pyro Emitter Tag"
url: "https://help.maxon.net/c4d/en-us/Content/html/TPYRO.html"
section_path: "Simulate Menu > The Simulation System > The various Simulation Tags > Pyro Emitter Tag"
element_id: "TPYRO"
command_id: "1059388"
description: "This page documents the Pyro Emitter tag in Cinema 4D. Assigned to an object, it makes that geometry emit smoke, fire or steam for the Pyro simulation — …"
---

# Pyro Emitter Tag

> **Note:** **What is it about?**
>
> This page documents the **Pyro Emitter tag** in **Cinema 4D**. Assigned to an object, it makes that geometry emit smoke, fire or steam for the Pyro simulation — with the Pyro Fuel variant providing explosion-ready presets.

Add this tag to the object that will serve as an Emitter for smoke, steam or a flame. You can find the *Pyro tag* in the *Object Manager* under *Tags>Simulation Tags*. These object types are supported as Emitters for Pyro:

- Polygon objects and primitives
- Spline objects and parametric splines
- Special generators, such as the Volume Generator
- A particle Emitter
- A TP Geometry object (in combination with the Thinking Particles system)
- A MoGraph Matrix object

If you want to create an explosion, you can also directly access the *Pyro Fuel tag*, which can be found in the same menu. This is also the *Pyro Emitter tag*, except that it has different presets. There the calculations of *Density* and *Temperature* are disabled and only *Fuel* is generated, which can then be converted into heat, smoke (density) and pressure by the settings of the *Pyro* *scene* at the Pyro Output object. However, *Fuel* can also be simulated with the *Pyro Emitter tag*. Switching between the two Pyro tag types is therefore possible at any time.

The *Pyro Emitter tag* thus forms the basis of any Pyro simulation and automatically creates the *Pyro Output object* (if none is already present in the scene), which can then be used to define the simulation in more detail in the second step and also to save it as a cache file, for example. By default, the *Pyro Output object's* settings are taken from the defaults of the **Project Settings** (*Simulation tab*, *Pyro subgroup*). However, a [Simulation Scene object](https://help.maxon.net/c4d/en-us/Content/html/OPBDSCENE.html.md) can also be linked there, which can also be used to define Pyro simulation settings. The *Simulation Scene object* can be found in the Cinema 4D *Simulate menu*.

A simulation of steam, smoke or fire is based on various components that can be generated individually or in combination. A steam or smoke component of the simulation can be created using the **Density settings** in the *Pyro tag* and can also be colored individually.\
The typical color gradients of a flame are characterized by different **temperatures**, which can also be calculated in the simulation. **Fuel** can be added to control the heat or even the pressure in the simulation. For a continuous or varied supply of *fuel* to the simulation, its temperature and therefore the size and color of the visible flame can be controlled. By burning a large amount of fuel for a short time, explosions and their characteristic mushroom clouds can even be simulated. Burned *fuel* in turn creates a *density* that can represent smoke, even if no *Density simulation* was previously activated. All these elements can be simulated individually via the *Pyro Emitter* or *Pyro Fuel tag*. The evaluation of the *fuel* and the definition of Forces and calculation parameters for the smoke and temperature development, can then be found in the *Pyro Scene tab* of the separate *Pyro Output object*.

> **Tip:** Note:Here you can find an [overview page for simulating](https://help.maxon.net/c4d/en-us/Content/html/GETTING_STARTED_WITH_PYRO_SIMULATION.html.md) smoke, flames and explosions with Pyro. You will learn about the interaction of the various Pyro components, also by means of examples.