Enabled () – Turns the V-Ray Rectangle Light on and off.
Color/Texture – Specifies the color of the light. A high dynamic range texture can be used. Make sure that the map checkbox is enabled for the texture to take effect.
Intensity – Specifies the strength of the light.
Units – Specifies the light unit of measurement. Using correct units is essential when working with physical camera exposure. The light automatically takes the scene units scale into consideration to produce correct result.
Default (Scalar) – The color and multiplier directly determine the visible color of the light without any conversion. The light surface will appear with the given color in the final image when seen directly by the camera. Luminous Power (Lumens) – Total emitted visible light power measured in lumens. The intensity of the light will not depend on its size. A typical 100W incandescent light bulb emits about 1500 lumens of light. Luminance (lm/m^2/sr) – Visible light surface power measured in lumens per square meter per steradian. The intensity of the light depends on its size. Radiant Power (W) – Total emitted visible light power measured in watts. The intensity of the light does not depend on its size. This is not the same as the electric power consumed by a light bulb. A typical 100W light bulb only emits between 2 and 3 watts as visible light. Radiance (W/m^2/sr) – Visible light surface power measured in watts per square meter per steradian. The intensity of the light depends on its size.
Shape – Specifies the structure of the light object.
Rectangle – Sets the shape to a planar rectangle. Ellipse – Sets the shape to a planar ellipse.
U Size – Determines the U size of the light measured in scene units. Additional light scaling does not affect this parameter.
V Size – Determines the V size of the light measured in scene units. Additional light scaling does not affect this parameter.
Size – Determines the light size measured in scene units. Available when the light Shape is Disc. Additional light scaling does not affect this parameter.
Directionality – When this value is 0, the light is spread out equally in all directions. Increasing this value makes the light beam more narrow and concentrates it in one direction. See the Directionality example below for illustration.
