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Area lights have many additional options.
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Any geometry can be selected to act as
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a mesh light
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Selecting an Area Light
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Geometry
The shape of area lights can be either one of the default shape provided, or any Maya geometry mesh, including multiple geometries. They can be selected using Select Geometry...
The selected geometries will:
- Be parented underneath the original area light. So the transform of the area light will be applied to the selected geometries.
- Have the area light shader assigned.
- Inherit all the attributes of the area light (exposure, intensity, color, etc).
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A Simple Demo Scene
This is a simple example showing a filament shaped in a torus rendered as an area light. This Maya scene can be downloaded here
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Specifies the spread of the light. A spread of 1 is to natural "cosine" spread. Lower spreads will produce a more focused light. From left to right: 0.2, 0.5 and 1.0 (default).
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Normalize Intensity by Area
Visible to Primary Rays
Makes area light visible to primary (a.k.a camera) rays. From left to right: off (default) and on.
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Two Sided
When enabled, area light will illuminate from both sides. Note that this has no effect with the sphere shape.
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Default Shape
Allows you to select the a different number of shapes (left to right): square, sphere, disk and sylinder.
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