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Rendering-Related Classes

Environment

This section describes settings that control environment of the scene (scattering, haze, etc.). You can create some presets and smoothly combine them by specifying the intensity of a preset thus producing new environments.

Environment Settings
Enable Toggles rendering of environment on and off.
Background Color Color rendered on the scene background. The color has an alpha channel that sets transparency of the background: the lower the value of the alpha channel is, the more transparent and, therefore, the darker the background color is. For example, the parameter allows creating colored transparent background instead of rendering an environment cubemap. However, if the environment cubemap is rendered, the background color will always be rendered over the environment. For example, it can be used to create brighter, richer sky colors with light scattering.
Black background color
Default Background Color
Blue background color
Blue Background

Environment Presets#

The environment cubemap is tweaked in the Rendering panel -> Environment tab. The scattering can have up to 3 separate settings presets that can be blended by the Preset intensity scroll bars.

Presets work as layers: the first preset will overlay the zero one, the second will overlay the first and the zero ones. For example, you can set the zero preset for the clean and clear sky, set the first preset for the cloudy sky and lerp them smoothly.

Scattering LUT Settings#

All the presets settings are identical. The scattering versatility is achieved mostly because of the scattering LUT textures.

Base#

A texture defining the base color of the sky. The texture means the following:

  • Left to right: the position of the Sun above the surface (time of day).
  • Top to down: the gradient of the Sun.

At the example below, when the Sun's angle is 90 degrees (right in the middle of gradient), the sky's top is blue, the horizon is yellow, the sky below the horizon is brown.

Base LUT Texture

Mie#

A texture (for both the Sun and the Moon) for setting the Mie light (the color of the light round the Sun).

Mie LUT Texture

Light Color#

A texture defining the color of the LightWorld for different times of day. The texture means the following:

  • Top to down: the WorldLight's angle of slope.

Left to right texture direction doesn't matter, so you can use the texture 1×512 (width to height) pixels in size.

Light Color LUT Texture

Environment Settings#

Environment settings are required for creating environment by means of panorama (cubemap).

Texture A cubemap defining the environment color.
Color The environment color multiplier, where alpha defines the visibility of a cubemap above scattering. This parameter is required when you need to display a sky with a photo texture and dynamic gradients at the same time.
Blur A value defining blurring of the environment.
Rotation X The rotation angle of the environment cubemap around the X axis.
Rotation Y The rotation angle of the environment cubemap around the Y axis.
Rotation Z The rotation angle of the environment cubemap around the Z axis.

Haze Settings#

This group of parameters set the atmosphere haze. It automatically uses the color from the scattering LUTs, so objects smoothly fade into the distance without any artifacts.

Haze Settings
Mode Mode of haze rendering. The following values are available:
  • Disabled - the haze is disabled.
  • Solid - the solid color from the Color parameter is used.
  • Scattering - the color from the sky LUTs is used. This value is recommended for better realism: objects will smoothly fade into the distance.
Notice
You can also use the render_environment_haze console command to specify the rendering mode for the haze.

Gradient Mode Gradient mode of the haze. By using this option, you can make the haze look more realistic for a specific distance range. The following values are available:
  • Short Distance Range - the haze will look more realistic for a short distance range (for example, near-surface haze).
  • Long Distance Range - the haze will look more realistic for a long distance range (for example, haze in mountains).
Notice
You can also use the render_environment_haze_gradient console command to specify the gradient mode.
Color The color of the haze. This value can be specified for both the Solid and Scattering haze modes: in the first case, the color will be used as is, in the second case, the color will be blended with the color from the sky LUTs.

Max distance The distance starting at which the haze becomes completely solid, so nothing will be seen behind. For large terrains it is recommended to set this parameter equal to your camera's Far parameter. This is required for distant objects to fade into the distance instead of being cut sharply.
Density The density of the haze.

Intensity Settings#

Notice
It is recommended to use the default values of the parameters below (if possible) to keep the image realistic.

Intensity Settings
Ambient Intensity of the environment ambient lighting for the given preset. 0 value means no environment ambient lighting for the given preset. The higher the value, the more ambient lighting affects environment. The value can be greater than 1.0 (useful for some dark scenes).

Reflection Intensity of the environment reflection for the given preset. 0 value means no environment reflection for the given preset.

Sky Intensity of the environment sky for the given preset. 0 value means no environment sky for the given preset. If, for example, the sky looks too dark in contrast with lighting from it, you should check exposure and tone mapping settings before changing the environment intensity.

Celestial Bodies Settings#

This group of parameters allows setting up the notable celestial bodies: the Sun and the Moon. By using these parameters, you can set the Sun and the Moon by using textures, adjust its intensity and color multipliers, specify the angular size of the celestial bodies. By default, values of the parameters are set for an observer on the Earth.

Sun A texture that sets the Sun in the sky. On the picture below, the Sun Size is increased to demonstrate how the textures are applied:

Moon A texture that sets the Moon in the sky. On the picture below, the Moon Size and the Moon Intensity are increased to demonstrate how the textures are applied:

Sun Color Color multiplier for the Sun texture in the RGBA format. By default, the color is white.
Moon Color Color multiplier for the Moon texture in the RGBA format. By default, the color is white.
Sun Size Angular size of the Sun in degrees. The value is set for an observer on the Earth. By default, the size of the Sun is 0.5 degrees as seen from the Earth.
Moon Size Angular size of the Moon in degrees. The value is set for an observer on the Earth. By default, the size of the Moon is 0.5 degrees as seen from the Earth.
Sun Intensity Intensity multiplier for the Sun texture. It allows increasing/reducing brightness of the Sun.

Moon Intensity Intensity multiplier for the Moon texture. It allows increasing/reducing brightness of the Moon.

Last update: 2019-02-14