--- title: "Rectangle Light" canonical: "https://documentation.chaos.com/space/VRHINO/116132061/Rectangle%20Light" format: markdown --- This page provides information on the V-Ray Rectangle Light.   ## **Overview** --- The V-Ray Rectangle Light, is a V-Ray specific light source plugin that can be used to create physically accurate area lights. It is a good general-purpose V-Ray light for lighting scenes to simulate real-world light sources like lamps and ceiling lights. V-Ray Rectangle light(s) can be instanced by using Array or Alt+drag the light object in the Rhino viewport.   ## **UI Paths** --- ## **Parameters** --- --- > Macro (anchor) ### **Example: Directionality** This example demonstrates how the light changes when Directionality value is changed, ranging from 0 to 1. When the value is closer to 1, the light is more focused towards one point, while when the value is closer to 0, the light spreads to all sides.      ## **Options** --- --- > Macro (anchor) ### **Example: Double Sided** This example demonstrates the behavior of the light when Double Sided option is enabled and disabled. When the Double Sided option is enabled, light is emitted from the two sides of the Rectangle light body.      ## **Notes** --- 1. The Portal Light option in V-Ray Rectangle light is now a legacy option and is no longer exposed in the UI. Rectangle lights in files saved with previous V-Ray versions and this option enabled will still have it available. Regardless, for best performance consider disabling it and using the Adaptive Dome Light option instead.