Variables

Variable

Definition

Value

Sea Level Deg. C

For infra-red rendering.

-273.0 to 1000

Zenith

Colour of the Zenith (Sky above you). See Sky Colours

RGB

Horizon

Colour of the Horizon (Sky around you). See Sky Colours

RGB

Variable

Definition

Value

Loop

If the sky should loop the first day. The loop can be seen on the timeline, indicated by a yellow bracket above the Sky Layer.

Bool

Variable

Definition

Value

Sky Multiplier

Multiplier to scale the brightness of the Sky.

1 to 100

Atmosphere

Variable

Definition

Value

Planet Radius

Radius of the planet in meters.

100 to 100000

Atmosphere Thickness

Thickness of the Atmosphere in Km.

10 to 1000

Ozone

Ozone level of the atmosphere.

0 to 0.2

Emissivity

Emissivity of the Atmosphere.

0 to 1

Rayleigh Coefficient

Rayleigh scattering coefficients at standard sea level density, xyz = RGB. Can be calculated based on wavelength with Auto Button.

0 to 10000

Variable

Definition

Value

Atmospherics Amortization

How to spread the cost of rendering atmospherics over frames. Similar to Cloud Amortization.

1 to 8

Sun

Variable

Definition

Value

Automatic Sun Position

Whether to calculate sun’s position to be Geographically Accurate. Disable to set the position manaully.

Bool

Variable

Definition

Value

Light Wavelength (R,G,B)

Wavelength of the light from the sun.

0 to 1000

Irradiance

Irradiance of the Sun, in Watts/m2/nm. XYZ=RGB.

0 to 50

Diameter

Size of sun?s radius in degrees.

0.0 to 3600.0

Link Keyframe time and daytime

See Link Keyframe Time

Bool

Time Zone

Time Zone based on Greenwich Mean Time (GMT).

Between -12.0 and 12.0

Start Date

For calculating position of sun/moon. Where 01/01/2000 = 0 , -1 = 31/12/1999, 01/01/2016 = 5844(format DD:MM:YYYY).

-100000 to 100000

Variable

Definition

Value

Sun Multiplier

Multiplier to scale the brightness of sunlight in the scene.

From 1 to 10

Max Sun Radiance

Maximum Sun radiance produced.

0 to 1000000.0

Adjust Sun Radiance

If enabled, adjusting the Sun radiance will cause the sun to automatically scale to keep spectral irradiance the same.

Bool

Moon (Legacy 4.1 System)

The moon has a customisable texture, so you can use it to make some interesting effects! This is a legacy system found in 4.1a and 4.2 versions of the plugin)

Variable

Definition

Value

Automatic Moon Position

Whether to calculate moon position from date and time.

Bool

Variable

Definition

Value

Albedo

The proportion of the incident light that is reflected by a surface.

0.0 to 1.0

Diameter

Size of moon’s radius in degrees

0.0 to 3600.0

Colour

Colour of the moon. Uses a colour wheel, can also input HTML Colour Code.

RGB

Variable

Definition

Value

Moon texture

Texture to use for the Moon. trueSKY has a moon texture by default.

.png

Moon Multiplier

Brightness multiplier for the Moon.

0.0 to 10.0

Moon (Multi Moon - 4.2a)

This system is found in unreal 4.2a versions and allows for multiple moons and extensive customisation of both the moons and the orbital paths. Find more information and indepth descriptions go here

Variable

Definition

Value

Name

Allows for assigning a name for each Moon within the scene. This help differentiate between multiple Moons.

text

Texture

2D Texture to use for the Moon.

.png

Name

Allows for assigning a name for each Moon within the scene. This help differentiate between multiple Moons.

text

Colour

Affects the texture of the Moon and the light that is reflected off of it.

RGB

Use Preset

Allows you to use one of the preset Moon templates. Checking this will cause all your currently setting to be overridden.

Bool

Moon Preset

Changes all of the settings within the Moon array element to a series of preassigned values.

Dropdown

Albedo

Controls the proportion of light that is reflected by the Moon.

0.0 to 10.0

Longitude of the Acending Node

The points in which the Moon crosses the plane of the equator.

0.0 to 360.0

Longitude of Ascending Node Rate

The amount the ascending node increases each day (24 hour period).

0.0 to 10.0

Inclination

This controls the tilt angle of the orbit.

0.0 to 360.0

Argument of Pericentre

The closest point of that the Moon is to the Earth’s surface.

0.0 to 360.0

Argument of Pericentre Rate

How much the argument of the pericentre changes per day.

0.0 to 10.0

Mean Distance

The mean (average) distance the Moon is from the center of the Earth.

0.0 to 100.0

Eccentricity

Controls how elliptical the orbit of the Moon will be around the Earth.

0.0 to 1.0

Mean Anomaly

The position that the Moon will be around its orbit at midnight of each day.

0.0 to 360.0

Mean Anomaly Rate

Controls how much the mean anomaly changes each day.

0.0 to 10.0

Radius Arc Minutes

Controls the apparent size of the Moon when visualized from the surface of the Earth.

0.0 to 1000.0

Stars

Variable

Definition

Value

Max Magnitude

Maximum Magnitude of stars.

0.0 to 9.0

Brightness

Star Brightness.

1.0 to 10000.0

Minimum Pixel Size

Minimum size of each star.

1.0 to 10000.0

Background

Brightness multiplier for background texture.

0.000001 to 0.001

Find Constellation

Out for Repairs

Out for Repairs

Variable

Definition

Value

Cosmic Background Texture

Texture to appear for the night sky. Default is an image of the Milky way.

.png

Minimum Star Pixel Size

Minimum pixel size of stars in the sky. If set to 0 they are drawn as point, otherwise as quads. Does not affect the Sun.

0 to

Fog

A keyframe’s haze value determines how much Mie-scattered haze (i.e. mist or fog) is present. Haze is considered to have a density that falls-off exponentially with altitude, so the HazeScaleHeightKm property determines the scaling height for this exponential. TheHazeBaseHeightKm is also used. Below this height, full haze is applied.

Variable

Definition

Value

Visibility

Visibility controls haze/fog, represents visibility at sea level.

0.1 to 10000

Haze/fog

Amount of haze/mist.

0.00001 to 1000.0.

Haze Base

Base altitude above which haze decreases in density.

-2.0 to 20.0.

Haze Scale

Vertical scale over which haze reduces with altitude.

0.1 to 10.0.

Eccentricity

Anisotropy of Mie scattering.

0.0 to 1.0.

Ground Fog

Strength of ground fog.

0.0 to 10.0.

Fog Ceiling

Fog Ceiling in Km.

0 to 10.

Mie Coefficients

Mie scattering coefficients. XYZ = RGB.

0 to 50