This page provides information about the Light Rectangle in V-Ray for Grasshopper.
Overview
V-Ray Rectangle Light node creates a rectangle light source. This light source can be connected to the V-Ray Render which will automatically add it to the rendered scene. If a list of input Positions is connected to this component, multiple lights are generated. Multiple Target and Size values can also be used. The Number of Instances tag at the bottom of the node indicates how many times the object is currently being instanced. The number of input Positions determines the lights count. The number of Target and Size values do not affect the lights count. |
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Input Parameters
On (Boolean) – Enables or disables the light source.
Position (Point) – Sets the light source point position. If a list of input Positions is connected multiple lights are generated. Note: The number of input positions determines the lights count.
Target (Point) – The Rectangle light Position and Target combined determine the light orientation vector.
Color (Color)– Provides a slot to set a light source color.
Intensity (Number) – Provides an option to control the light source intensity. Calculated in Default (Scalar) units.
Invisible (Boolean) – This option makes the light source invisible. It does not affect the light source's illuminance.
Shape (Integer) – Specifies the shape of the light object..
U/V Size (Number) – Controls the U/V size of the light square measured in scene units.
Directionality (Number) – Specifies the spread of the light beam. Value of 0 emits light equally in all directions. Increasing the value makes the light beam more narrow and concentrates it in one direction.
Output Parameters
Add Light (Generic Data) – Light output that can be connected to a V-Ray Render node.
Example
Rectangle Light node connection. Note the toggled off Simple Light Rig plugged used as an override. If there is no Light Rig input in the V-Ray Render component it will always internally create one.