Aerial Perspective

This page provides information about the Aerial Perspective effect in V-Ray for Blender.

Overview

The V-Ray Aerial Perspective atmospheric effect simulates aerial perspective - the effect that the Earth atmosphere has on the appearance of objects that are viewed from a distance, and which is similar to fog or haze. The atmospheric effect works together with the VRaySun and the VRaySky to calculate an approximation to the aerial perspective effect. It is faster to calculate than the Fog atmospheric effect, although the result is just an approximation. For example, the Aerial Perspective atmospheric effect cannot produce volumetric shadows.

UI Path

||Node Editor|| > Add > Effects > Aerial Perspective

Node

Parameters

Distance (m) – Specifies the distance, in meters, at which the fog has absorbed 90% of the light coming from objects behind it. Lower values make the fog appear more dense, while larger values reduce the effect of the aerial perspective. For more information, see the Distance example below.

Height (m) – Controls the height of the atmosphere layer, in meters. Lower values can be used for artistic effects. The value is in meters and is converted internally based on the current Maya units. For more information, see the Height example below.

Inscattered Light – Controls the amount of sunlight scattered from the atmospheric effect. The default value 1.0 is physically accurate; lower or higher values could be used for artistic purposes.

Filter Color – Affects the color of the unscattered light.

Affect Environment Rays – When Disabled, the atmospheric effect is applied only to camera rays that hit actual objects, but not to rays that hit the sky. This is because the VRaySky texture already takes into account the amount of scattered sunlight. However, it is possible to enable this option for artistic effects, especially with low visibility ranges. For more information, see the Affect Environment example below.

Affect Background – Specifies whether the effect is applied to camera rays that hit the background (if a background other than VRaySky is used). Normally this option should be disabled, but some interesting effects are possible when this option is enabled.