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.. Generated automatically by doc/tools/makerst.py in Godot's source tree.
.. DO NOT EDIT THIS FILE, but the Sky.xml source instead.
.. The source is found in doc/classes or modules/<name>/doc_classes.

.. _class_Sky:

Sky
===

**Inherits:** :ref:`Resource<class_Resource>` **<** :ref:`Reference<class_Reference>` **<** :ref:`Object<class_Object>`

Background that uses a :ref:`Material<class_Material>` to draw a sky.

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

The ``Sky`` class uses a :ref:`Material<class_Material>` to draw the background and update the reflection/radiance cubemaps.

Properties
----------

+--------------------------------------------+--------------------------------------------------------+-------+
| :ref:`ProcessMode<enum_Sky_ProcessMode>`   | :ref:`process_mode<class_Sky_property_process_mode>`   | ``0`` |
+--------------------------------------------+--------------------------------------------------------+-------+
| :ref:`RadianceSize<enum_Sky_RadianceSize>` | :ref:`radiance_size<class_Sky_property_radiance_size>` | ``3`` |
+--------------------------------------------+--------------------------------------------------------+-------+
| :ref:`Material<class_Material>`            | :ref:`sky_material<class_Sky_property_sky_material>`   |       |
+--------------------------------------------+--------------------------------------------------------+-------+

Enumerations
------------

.. _enum_Sky_RadianceSize:

.. _class_Sky_constant_RADIANCE_SIZE_32:

.. _class_Sky_constant_RADIANCE_SIZE_64:

.. _class_Sky_constant_RADIANCE_SIZE_128:

.. _class_Sky_constant_RADIANCE_SIZE_256:

.. _class_Sky_constant_RADIANCE_SIZE_512:

.. _class_Sky_constant_RADIANCE_SIZE_1024:

.. _class_Sky_constant_RADIANCE_SIZE_2048:

.. _class_Sky_constant_RADIANCE_SIZE_MAX:

enum **RadianceSize**:

- **RADIANCE_SIZE_32** = **0** --- Radiance texture size is 32×32 pixels.

- **RADIANCE_SIZE_64** = **1** --- Radiance texture size is 64×64 pixels.

- **RADIANCE_SIZE_128** = **2** --- Radiance texture size is 128×128 pixels.

- **RADIANCE_SIZE_256** = **3** --- Radiance texture size is 256×256 pixels.

- **RADIANCE_SIZE_512** = **4** --- Radiance texture size is 512×512 pixels.

- **RADIANCE_SIZE_1024** = **5** --- Radiance texture size is 1024×1024 pixels.

- **RADIANCE_SIZE_2048** = **6** --- Radiance texture size is 2048×2048 pixels.

- **RADIANCE_SIZE_MAX** = **7** --- Represents the size of the :ref:`RadianceSize<enum_Sky_RadianceSize>` enum.

----

.. _enum_Sky_ProcessMode:

.. _class_Sky_constant_PROCESS_MODE_QUALITY:

.. _class_Sky_constant_PROCESS_MODE_REALTIME:

enum **ProcessMode**:

- **PROCESS_MODE_QUALITY** = **0** --- Uses high quality importance sampling to process the radiance map. In general, this results in much higher quality than :ref:`PROCESS_MODE_REALTIME<class_Sky_constant_PROCESS_MODE_REALTIME>` but takes much longer to generate. This should not be used if you plan on changing the sky at runtime.

- **PROCESS_MODE_REALTIME** = **1** --- Uses the fast filtering algorithm to process the radiance map. In general this results in lower quality, but substantially faster run times.

**Note:** The fast filtering algorithm is limited to 256x256 cubemaps, so :ref:`radiance_size<class_Sky_property_radiance_size>` must be set to :ref:`RADIANCE_SIZE_256<class_Sky_constant_RADIANCE_SIZE_256>`.

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

.. _class_Sky_property_process_mode:

- :ref:`ProcessMode<enum_Sky_ProcessMode>` **process_mode**

+-----------+-------------------------+
| *Default* | ``0``                   |
+-----------+-------------------------+
| *Setter*  | set_process_mode(value) |
+-----------+-------------------------+
| *Getter*  | get_process_mode()      |
+-----------+-------------------------+

Sets the method for generating the radiance map from the sky. The radiance map is a cubemap with increasingly blurry versions of the sky corresponding to different levels of roughness. Radiance maps can be expensive to calculate. See :ref:`ProcessMode<enum_Sky_ProcessMode>` for options.

----

.. _class_Sky_property_radiance_size:

- :ref:`RadianceSize<enum_Sky_RadianceSize>` **radiance_size**

+-----------+--------------------------+
| *Default* | ``3``                    |
+-----------+--------------------------+
| *Setter*  | set_radiance_size(value) |
+-----------+--------------------------+
| *Getter*  | get_radiance_size()      |
+-----------+--------------------------+

The ``Sky``'s radiance map size. The higher the radiance map size, the more detailed the lighting from the ``Sky`` will be.

See :ref:`RadianceSize<enum_Sky_RadianceSize>` constants for values.

**Note:** Some hardware will have trouble with higher radiance sizes, especially :ref:`RADIANCE_SIZE_512<class_Sky_constant_RADIANCE_SIZE_512>` and above. Only use such high values on high-end hardware.

----

.. _class_Sky_property_sky_material:

- :ref:`Material<class_Material>` **sky_material**

+----------+---------------------+
| *Setter* | set_material(value) |
+----------+---------------------+
| *Getter* | get_material()      |
+----------+---------------------+

:ref:`Material<class_Material>` used to draw the background. Can be :ref:`PanoramaSkyMaterial<class_PanoramaSkyMaterial>`, :ref:`ProceduralSkyMaterial<class_ProceduralSkyMaterial>`, :ref:`PhysicalSkyMaterial<class_PhysicalSkyMaterial>`, or even a :ref:`ShaderMaterial<class_ShaderMaterial>` if you want to use your own custom shader.