This render element is enabled through the the Render Elements tab of the Render Setup window in 3ds Max, and displays its parameters in a rollout at the bottom of the window:
VrayVFB – When enabled, the render element appears as a selection in the New V-Ray Frame Buffer.
Deep output – Specifies whether to include this render element in deep images.
Color mapping – Applies the color mapping options specified in theColor mappingrollout of the V-Ray tab in the Render Setup window to this render element. This option is disabled by default.
Multiplier – Sets the overall intensity of the render element, where 1.0 is the standard multiplier.
Denoise – Specifies whether to denoise this render element.