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Place a Sky Light in the scene to capture Sky Atmosphere and have it contribute to the scene lighting. 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. A high frequency pattern can become visible when it should be absorbed by temporal anti-aliasing (TAA). However, when moving the camera very fast, there is a camera cut that happens—restarting TAA—so it is visible in space views. 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.

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The Sky Atmosphere visualization and debugging view enables you to see—in real time—the changes you make to the atmosphere settings. You can have two atmospheric Directional Lights that receive sun disk representation in the atmosphere with sky color that depends on the sunlight and atmosphere properties. 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. Aerial perspective that simulates the curvature of the world when transitioning from ground to sky to space views. Ctrl + L + Shift with mouse movement will adjust the Directional Light set to index 1. Typically this would be the Moon.Once disabled, it is worth noting that you may encounter the following issues. These are some suggestions to help you work around them for your project to find a balance that best fits your project. Trade performance for quality increase by increasing the number of samples with r.SkyAtmosphere.SampleCountMax or r.SkyAtmosphere.DistanceToCountMax. The Sky Atmosphere gives an approximation of light scattering through a planetary atmosphere's participating media, giving outdoor levels a more realistic or exotic look by including the following: The Sky Atmosphere system is optimized for scenes that are on ground level. However, there is nothing preventing you from traveling from the ground to a high aerial view, or even outer space. While the transition through the atmosphere should be seamless—without a noticeable transition—from the look-up tables (LUTs) to per pixel tracing, you may sometimes experience a hitch or when this happens. Set a high value for the Dynamic Shadow Distance. For instance, the examples below used a shadow distance of 100000000 units (or 1000 kilometers).

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Enable Cast Shadow on Atmosphere to cast shadows from opaque objects. Also, enable Cast Cloud Shadows to enable shadow casting from cloud materials when using the Volumetric Cloud system. The tracing quality of the atmosphere is scalable using the Sky Atmosphere component's Trace Sample Count Scale property. This property is important when generating LUTS, or when using per pixel tracing. The maximum number of samples is clamped but can be increased by using the console command r.SkyAtmosphere.SampleCountMax. Also, keep in mind that the number of samples only reach the specified kilometers set by r.SkyAtmosphere.DistanceToSamplesCountMax. Ctrl + L with mouse movement will adjust the Directional Light set to index 0. Typically this would be the Sun.In this material, you will have the freedom to compose the sky, sun disk, clouds and aerial perspective. Also, you will have to compute lighting on the clouds and other elements in the sky. Several Material Expressions can be used to achieve this in your materials. You can find them by searching the term "SkyAtmosphere" in the Material Editor.