This page provides information on the V-Ray Sphere Fade Gizmo.
Overview
The VRaySphereFade is a V-Ray specific atmospheric effect that extracts and renders small parts of the scene by putting them in an atmospheric gizmos.
VRaySphereFade Parameters
Gizmos – Holds a list of the atmospheric gizmos that are going to be affected by the VRaySphereFade atmospheric.
Invert inside – Inverts the volume that is shaded, rendering the part of the scene that is outside the locator.
+ – Click to pick atmospheric gizmos from the scene to add them to the Gizmos list.
- – Removes the selected gizmo from the Gizmos list.
Remove All – Removes all gizmos from the Gizmos list.
Falloff type – Specifies what dimensions of the gizmo to be taken into account.
Min dimension – Takes half of the shortest side of the gizmo box or half of the radius/height of the gizmo cylinder. When using sphere gizmos, the radius value is always used so the min/max dimensions give equal results
Max dimension – Takes half of the main diagonal of the gizmo box or cylinder. When using sphere gizmos, the radius value is always used so the min/max dimensions give equal results.
Absolute – Uses world units for the gizmo.
Relative falloff – Specifies a falloff coefficient relative to the gizmo dimensions to blend the content in the atmospheric gizmo with the background. It takes values from 0 to 1. Relative falloff is active only when Falloff type is set to Min dimension or Max dimension.
Absolute falloff – Specifies a falloff value in world units to blend the content in the atmospheric gizmo with the background. Absolute falloff is active only when Falloff type is set to Absolute.
Outside color – Specifies the color for the background - everything outside the atmospheric gizmos.
Affect alpha – When enabled, V-Ray renders an alpha channel where everything outside the atmospheric gizmos is transparent and the objects inside the gizmos have their normal alpha.
Example - Relative falloff
The examples below all use a sphere gizmo with a radius of 16.0 aligned to the center of the bowl. This provides the active area used by VRaySphereFade and has been added as an active gizmo in the VRaySphereFade parameters list. By changing the value of the Relative falloff the amount of fade can be adjusted. The fade effect takes place from the gizmo itself inwards, so the gizmo must contain that you wish to see.
The Sphere Gizmo has been aligned to the center of the bowl.
VRaySphereFade with Relative falloff turned off
VRaySphereFade Relative falloff with a value of 0.0
VRaySphereFade Relative falloff with a value of 0.2
VRaySphereFade Relative falloff with a value of 0.4
VRaySphereFade Relative falloff with a value of 0.8
VRaySphereFade Relative falloff with a value of 1.0
Example - Outside color
The Outside color (the area outside of that affected by the VRaySphereFade gizmo and its falloff) can be changed from a default of mid gray to any color required.
For the following examples, the Relative falloff has been set to a value of 0.5.
VRaySphereFade Outside color set to mid grey
VRaySphereFade Outside color set to black
VRaySphereFade OUtside color set to mid green
Notes
- VRayShereFade is currently not supported for rendering with Chaos Cloud and V-Ray Standalone.