A sky color that will vary, depending on the altitude of the sun, or in other terms, how close the dominant Directional Light's vector gets to being parallel with the ground. When the sun is at its zenith, it should be set to 120000 lux (or cd:sr*m A working example template map demonstrating a skydome mesh with a material using the Sky Atmosphere Material Expressions is available with UE4. To set up a skydome mesh to work with the Sky Atmosphere component, you'll need to set the following in its Material: Atmosphere Height defines the height of the atmosphere above the planet's surface (measured in kilometers).

Colour-Changing Car Atmosphere LED Lights - Menkind Colour-Changing Car Atmosphere LED Lights - Menkind

The Sky Atmosphere component can be parented to objects in the scene, such as a planet mesh. Atmosphere Transmittance Should your project require Exponential Height Fog, it can be enabled in the Project Settings under the Rendering category by setting Support Sky Atmosphere Affecting Height Fog.Place a Directional Light in the scene, and from its Details panel, enable Atmosphere/Fog Sun Light. Decreasing the Mie Anisotropy scatters light more uniformly across the atmosphere. This example is using a value of 0.

Atmosphere | An Open Access Journal from MDPI Atmosphere | An Open Access Journal from MDPI

Set up logic to adjust and tweak atmospheric properties when in outer space to have less particles near the ground, making them more uniform and height distributed. Use caution when increasing the Aerial Perspective LUT. It uses a 3D volume texture. Increasing its size can significantly increase memory usage. Achieving cinematic quality of atmosphere rendering is done by disabling the Sky View and Aerial Perspective LUTs optimizations, which use a lower resolution to be performant. They can be disabled by setting r.SkyAtmosphere.FastSkyLUT and r.SkyAtmosphere.AerialPerspectiveLUT.FastApplyOnOpaque to 0. Atmosphere will become slower to render but produces fewer visual artefacts with high-frequency detail that appear in some areas, such as a planet's shadow or its scattering lobe. You'll also want to increase the tracing quality on the Sky Atmosphere component (see above).

Atmosphere Light

The sky material is rendered as the last opaque mesh during the base pass, meaning that aerial perspective will not be applied on it to avoid double contribution. However, height fog and volumetric fog will continue to be applied, if used. Additionally, the Sky Atmosphere component supports artistic control when designing the look of your project. Simulating the sky and atmosphere in UE4 requires several properties that mimic the look and feel of a real-world atmosphere. These properties can be used to define the look of the sky and atmosphere by scattering light in an appropriate and accurate manner. By default, the Sky Atmosphere component in UE4 represents the Earth. Planet Top at Absolute World Position places the top ground level of the atmosphere at the world origin coordinates (0,0,0) in the scene. The Sky Atmosphere is not movable when this option is selected. The following properties are useful when setting up a planet to be viewed from outer space (or even just a very high altitude):