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.. _bpy.types.ShaderNodeTexSky:
****************
Sky Texture Node
****************
.. figure:: /images/node-types_ShaderNodeTexSky.webp
:align: right
:alt: Sky Texture Node.
The *Sky Texture* node generates a procedural sky. It's typically used in combination
with the :doc:`/render/shader_nodes/output/world`.
Inputs
======
Vector
Texture coordinate to sample texture at;
defaults to Generated texture coordinates if the socket is left unconnected.
Properties
==========
Sky Type
Sky model to use.
Preetham
Based on the 1999 `paper <https://doi.org/10.1145/311535.311545>`__ by Preetham et al.
Hosek/Wilkie
Based on the 2012 `paper <https://cgg.mff.cuni.cz/projects/SkylightModelling/>`__ by Hosek and Wilkie.
Nishita
Improved version of the 1993
`model <https://www.scratchapixel.com/lessons/procedural-generation-virtual-worlds/simulating-sky/simulating-
colors-of-the-sky.html>`__
by Nishita et al.
Note that this sky type is quite bright and makes the image look overexposed with the default scene settings.
You can reduce the Exposure setting in :menuselection:`Properties --> Render --> Film` to fix this.
Sun Direction
Sun direction vector.
Turbidity
Atmospheric turbidity.
- 2: Arctic like
- 3: clear sky
- 6: warm/moist day
- 10: hazy day
Ground Albedo
Amount of light reflected from the planet surface back into the atmosphere.
Sun Disc :guilabel:`Cycles Only`
Enable/Disable sun disc lighting.
Sun Size
Angular diameter of the sun disc (in degrees).
Sun Intensity
Multiplier for sun disc lighting.
Sun Elevation
Rotation of the sun from the horizon (in degrees).
Sun Rotation
Rotation of the sun around the zenith (in degrees).
Altitude
The distance from sea level to the location of the camera.
For example, if the camera is placed on a beach then a value of 0 should be used.
However, if the camera is in the cockpit of a flying airplane then a value of 10 km will be more suitable.
Note, this is limited to 60 km because the mathematical model only accounts
for the first two layers of the earth's atmosphere (which ends around 60 km).
Air
Density of air molecules.
- 0 no air
- 1 clear day atmosphere
- 2 highly polluted day
Dust
Density of dust and water droplets.
- 0 no dust
- 1 clear day atmosphere
- 5 city like atmosphere
- 10 hazy day
Ozone
Density of ozone molecules;
useful to make the sky appear bluer.
- 0 no ozone
- 1 clear day atmosphere
- 2 city like atmosphere
Outputs
=======
Color
Texture color output.
Examples
========
.. figure:: /images/render_shader-nodes_textures_sky_example.jpg
:width: 200px
Example of Sky Texture.
|
