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Enable fog – Enables aerial perspective fog to be applied in the scene. See the Overview section above.

Fog visibility range – Specifies the distance in km at which the fog has absorbed 90% of the light coming from objects behind it. Lower values make the fog appear denser, while larger values reduce the effect. See the Fog Visibility Range example below.

Fog height – Specifies the height of the fog layer in meters. See the Fog Height example below.

Fog start distance – Specifies the distance from the camera at which the fog starts. See the Fog Start Distance example below.

Fog max opacity – Specifies the maximum opacity of the fog. A value of 1 means the fog is completely opaque, while 0 means the fog is invisible. See the Fog Max Opacity example below.

Fog color – Specifies the color of the fog layer. See the Fog Color example below.

The following parameters are available for the From V-Ray Scene mode:

Ground fog – When enabled, adds an additional scattering fog.

Ground fog distance – Specifies the ground fog density. Larger values make the fog more transparent, while smaller values make it denser and more opaque.

Ground fog height – Specifies the height of the ground fog in meters.

Ground fog transition – Specifies the transition falloff height of the ground fog in meters.

Raymarch step size – Specifies the size of one step through the volume. Smaller steps produce more accurate results but are slower to render. In general, dense volumes require smaller step sizes than more transparent volumes. In practice, step sizes that are two to three times smaller than the Fog distance parameter work well.

Raymarch cutoff threshold – Specifies the number of texture samples for each step through the volume. This allows to sample textures more accurately than the volumetric lighting. It is useful in cases where the textures vary much faster than the lighting itself (e.g. for detailed fractal textures).

Raymarch max steps – Specifies the maximum number of steps through the volume.