Hey , first time here? You can find the installation guide and first run in the getting started section.
Take a deep breath and have a look at the user interface. At a glance, it may look a bit complex. It is due to many tweakable parameters and fancy names like Kelvins, radiance, and absorption that we use to standardize variable names.
Horizontal and vertical movement of the sun.Allow to position sun in specific position creating feeling that it is a morning, midday or an evening.
Choose to see a physical sun disk in the sky.Disk can be removed in a specific edge cases when sun disk in renders appears too bright.
Choose to use a sun lamp or sun disk in the world for illumination.Enabling this will ensure that there are sun shadows present in Eevee, as well as potentially help Cycles render quicker by requiring slightly fewer samples. Disabling this will mostly benefit Cycles renders, where the result will be more accurate with better matching reflections.
The size of the sun disk.Affects shadow and lighting softness and the visual appearance of the sun disk.
Physical temperature (in Kelvins) of the sun changes the color of the sun disk.The bigger the value, the bluer the sun.
Intensity of the binary sun emission.Higher intensity makes the sun brighter, thus illuminating the scene more.
Enables a second sun that is bound to the main sun.
Control how much atmosphere is present on the planet.For example, 0 is the vacuum of the space, but 1.22 kg/m3 is the atmosphere density for the Earth.
Determines how high the atmosphere goes in the scene, affecting density distribution.Mostly affects vertical transitions in the atmosphere, where lower scale heights will make effects of changing altitude appear quicker.
Artistical control that affects how bright the atmosphere appears.Atmosphere intensity multiplier.
Artistical control that affects how bright the atmosphere appears at night.Atmosphere intensity multiplier.
Artistical control that gives a tint to the atmosphere particle.
Control how much light is scattered through the particle for each wavelength (RGB).Atmosphere scattering coefficients.
In real life situation, this should be an invert of inscattering value to give a physically accurate appearance.This control is exposed to give more artistic freedom.
Mie Scattering Intensity
Aura around the sun.Light scattering around the sun in the lower atmospheric layer.
Mie Scattering Anisotropy
How concentrated is the light scattering around the sun.
Chose manually or automatically to apply fog material node for every material in the scene.Manual allows to chose when fog material node is applied for materials. Auto applies fog material node whenever new material is added to an object.
Apply / Clear
Adds or removes fog material from every material in the scene.If user has manually disconnected fog node for material or relinked it in a different way we apply custom property psa_user_modified to object. This prevents our script from overriding user changes.