To turn a selected object into a Mesh Light, create a Mesh Light first from the V-Ray menu. Then drag and drop the object to the Mesh Light item in the Objects tab, making it a child of the Mesh Light.
Now the object has Mesh Light properties and you can control its settings from the parameters listed below.
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Enabled – Determines whether or not the Mesh Light emits light in the scene.
Color – Specifies the color of the light. When using photometric units, this color is normalized so that only the color hue is used, whereas the light intensity is determined by the Intensity.
Units – Using correct units is essential when you are working with the V-Ray Physical Camera. Note that when changing these units, theIntensity multiplier value is not converted to match the lighting and uses the same amount for all different units. The possible values are:
Default – The color and multiplier directly determine the visible color of the light without any conversion. The light surface appears with the given color in the final image when seen directly by the camera (assuming there is no color mapping involved). Lumens – Total emitted visible light power measured in lumens. When this setting is used, the intensity of the light does not depend on its size. A typical 100W electric bulb emits about 1500 lumens of light. Lm/m/m/sr – Visible light surface power measured in lumens per square meter per steradian. When this setting is used, the intensity of the light depends on its size. Watts – Total emitted visible light power measured in watts. When using this setting, the intensity of the light does not depend on its size. Keep in mind that this is not the same as the electric power consumed by the light source. A typical 100W light bulb only emits between 2 and 3 watts as visible light. W/m/m/sr – Visible light surface power measured in watts per square meter per steradian. When this setting is used, the intensity of the light depends on its size.
Intensity– A multiplier for the light Color; this is also the light intensity in the units chosen by theUnitsparameter.
