This page provides information about the V-Ray SphereFade Gizmo.
VRaySphereFadeGizmo is a volumetric node used to render just a small part of the scene by putting it in a special spherical locator.
||obj Network|| > Geometry node > V-Ray > V-Ray SphereFade Gizmo
Shape – Specifies the gizmo shape:
Radius – Controls the size of the gizmo shape.
Invert – Inverts the volume that is shaded, rendering the part of the scene that is outside the sphere.
The Invert can be turned on to only show everything visible in the scene outside of the Sphere fade volume. In the examples shown below a Falloff value of 0.1 has been used.