This page provides information on the Effects tab in the V-Ray Renderer node.
Overview
The Effects tab offers settings control over two volumetric effects - the Sphere Fade and the Aerial Perspective.
The Sphere Fade is a volumetric gizmo used to render just a small part of the scene by putting it in a special spherical locator.
The 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 V-Ray Sun and V-Ray Sky to calculate an approximation to the aerial perspective effect.
UI Paths:
||out Network|| > V-Ray > V-Ray Renderer > Effects tab
||V-ray Shelf|| > ROP Parm > Effects tab
V-Ray menu > Render Settings > Effect tab
Sphere Fade
When CUDA/RTX is chosen as a rendering engine, all unsupported options are disabled from the parameters.
Enable – Turns the Sphere Fade on and off.
Empty Color – Specifies the color outside the Sphere Fade. For more information, see the Empty Color example below.
Falloff – A radius amount that is used to blend the inside of the Sphere Fade with the Empty Color.
Affect Alpha – Controls whether or not the alpha channel is affected.
For more information, see the V-Ray SphereFade Gizmo page.
Aerial Perspective
Enabled – Turns the atmospheric effect on or off.
Sun – Specifies the V-Ray Sun object in the scene that the Aerial Perspective effect is connected to.
Distance – 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.
Height – Controls the height of the atmosphere layer, in meters. Lower values can be used for artistic effects.
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 – Specifies a filter color for the fog. Note that the fog color depends on the color of the sky.
Affect Environment – 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.
Affect Background – Specifies whether the effect is applied to camera rays that hit the background (if a background other than VRaySky is used). This option is enabled by default, but some interesting effects are possible when disabled.
Primary Visibility – When disabled, the effect appears perfectly transparent to camera rays.
Example: Empty Color
A V-RaySphereFadeVolume gizmo is used with the Shape set to Sphere and the radius of 390 aligned to the Viper fighter. This provides the active area used by V-Ray SphereFadeVolume. The Empty Color (the area outside of that affected by the V-Ray SphereFade Volume locator and its falloff) can be changed from a default of mid-gray to any color required.
For the following example, the Falloff has been set to a value of 0.1.
Empty Color set to mid-grey
Empty Color set to black
Empty Color set to green