godot-docs/classes/class_fogmaterial.rst

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.. _class_FogMaterial:

FogMaterial
===========

**Inherits:** :ref:`Material<class_Material>` **<** :ref:`Resource<class_Resource>` **<** :ref:`RefCounted<class_RefCounted>` **<** :ref:`Object<class_Object>`

:ref:`Material<class_Material>` used with a :ref:`FogVolume<class_FogVolume>` to draw things with the volumetric fog effect.

Description
-----------

A :ref:`Material<class_Material>` resource that can be used by :ref:`FogVolume<class_FogVolume>`\ s to draw volumetric effects.

Properties
----------

+-----------------------------------+--------------------------------------------------------------------+-----------------------+
| :ref:`Color<class_Color>`         | :ref:`albedo<class_FogMaterial_property_albedo>`                   | ``Color(1, 1, 1, 1)`` |
+-----------------------------------+--------------------------------------------------------------------+-----------------------+
| :ref:`float<class_float>`         | :ref:`density<class_FogMaterial_property_density>`                 | ``1.0``               |
+-----------------------------------+--------------------------------------------------------------------+-----------------------+
| :ref:`Texture3D<class_Texture3D>` | :ref:`density_texture<class_FogMaterial_property_density_texture>` |                       |
+-----------------------------------+--------------------------------------------------------------------+-----------------------+
| :ref:`float<class_float>`         | :ref:`edge_fade<class_FogMaterial_property_edge_fade>`             | ``0.1``               |
+-----------------------------------+--------------------------------------------------------------------+-----------------------+
| :ref:`Color<class_Color>`         | :ref:`emission<class_FogMaterial_property_emission>`               | ``Color(0, 0, 0, 1)`` |
+-----------------------------------+--------------------------------------------------------------------+-----------------------+
| :ref:`float<class_float>`         | :ref:`height_falloff<class_FogMaterial_property_height_falloff>`   | ``0.0``               |
+-----------------------------------+--------------------------------------------------------------------+-----------------------+

Property Descriptions
---------------------

.. _class_FogMaterial_property_albedo:

- :ref:`Color<class_Color>` **albedo**

+-----------+-----------------------+
| *Default* | ``Color(1, 1, 1, 1)`` |
+-----------+-----------------------+
| *Setter*  | set_albedo(value)     |
+-----------+-----------------------+
| *Getter*  | get_albedo()          |
+-----------+-----------------------+

Sets the single-scattering :ref:`Color<class_Color>` of the :ref:`FogVolume<class_FogVolume>`. Internally :ref:`albedo<class_FogMaterial_property_albedo>` is converted into single-scattering which is additively blended with other :ref:`FogVolume<class_FogVolume>`\ s and the :ref:`Environment.volumetric_fog_albedo<class_Environment_property_volumetric_fog_albedo>`.

----

.. _class_FogMaterial_property_density:

- :ref:`float<class_float>` **density**

+-----------+--------------------+
| *Default* | ``1.0``            |
+-----------+--------------------+
| *Setter*  | set_density(value) |
+-----------+--------------------+
| *Getter*  | get_density()      |
+-----------+--------------------+

Sets the density of the :ref:`FogVolume<class_FogVolume>`. Denser objects are more opaque, but may suffer from under-sampling artifacts that look like stripes.

----

.. _class_FogMaterial_property_density_texture:

- :ref:`Texture3D<class_Texture3D>` **density_texture**

+----------+----------------------------+
| *Setter* | set_density_texture(value) |
+----------+----------------------------+
| *Getter* | get_density_texture()      |
+----------+----------------------------+

Sets a 3D texture that is used to scale the :ref:`density<class_FogMaterial_property_density>` of the :ref:`FogVolume<class_FogVolume>`.

----

.. _class_FogMaterial_property_edge_fade:

- :ref:`float<class_float>` **edge_fade**

+-----------+----------------------+
| *Default* | ``0.1``              |
+-----------+----------------------+
| *Setter*  | set_edge_fade(value) |
+-----------+----------------------+
| *Getter*  | get_edge_fade()      |
+-----------+----------------------+

Sets the hardness of the edges of the :ref:`FogVolume<class_FogVolume>`. A higher number will result in softer edges while a lower number will result in harder edges.

----

.. _class_FogMaterial_property_emission:

- :ref:`Color<class_Color>` **emission**

+-----------+-----------------------+
| *Default* | ``Color(0, 0, 0, 1)`` |
+-----------+-----------------------+
| *Setter*  | set_emission(value)   |
+-----------+-----------------------+
| *Getter*  | get_emission()        |
+-----------+-----------------------+

Sets the :ref:`Color<class_Color>` of the light emitted by the :ref:`FogVolume<class_FogVolume>`. Emitted light will not cast light or shadows on other objects, but can be useful for modulating the :ref:`Color<class_Color>` of the :ref:`FogVolume<class_FogVolume>` independently from light sources.

----

.. _class_FogMaterial_property_height_falloff:

- :ref:`float<class_float>` **height_falloff**

+-----------+---------------------------+
| *Default* | ``0.0``                   |
+-----------+---------------------------+
| *Setter*  | set_height_falloff(value) |
+-----------+---------------------------+
| *Getter*  | get_height_falloff()      |
+-----------+---------------------------+

Sets the rate by which the height-based fog decreases in density as height increases in world space. A high falloff will result in a sharp transition, while a low falloff will result in a smoother transition. A value of ``0`` results in uniform-density fog. The height threshold is determined by the height of the associated :ref:`FogVolume<class_FogVolume>`.

.. |virtual| replace:: :abbr:`virtual (This method should typically be overridden by the user to have any effect.)`
.. |const| replace:: :abbr:`const (This method has no side effects. It doesn't modify any of the instance's member variables.)`
.. |vararg| replace:: :abbr:`vararg (This method accepts any number of arguments after the ones described here.)`
.. |constructor| replace:: :abbr:`constructor (This method is used to construct a type.)`
.. |static| replace:: :abbr:`static (This method doesn't need an instance to be called, so it can be called directly using the class name.)`
.. |operator| replace:: :abbr:`operator (This method describes a valid operator to use with this type as left-hand operand.)`