Area Lights From Polygons
Emit light from mesh rectangular Polygons.
Area Lights From Polygons
Method #
This node emits light from a polygonal mesh. All polygons must be rectangular, and the light is emitted based on quads, so tri-gons or n-gons will not calculate properly. A maximum of 128 polygons is allowed.
Lights are generated per poly, so if you tessellate to tris you get 2x lights per quad.
Parameters
These properties control the core behaviours of the node.
Parameter Details
Colour The colour of the light.
Brightness How bright the light is.
Scattering Intensity How much the light is scattered by the light, creating a simple fog around it.
Falloff Mode Change how the light falloff is calculated.
- Inner / Outer Radius (Legacy) : light falloff is calculated between the inner and outer radii.
- Inv-Squared Distance (Physical) : the light falloff is calculated based on a physically accurate system.
Inner Attenuation Distance Inner distance within which the light remains at full strength
Attenuation Distance Maximum distance the light reaches.
Falloff Power Change how strong the falloff for the light is between the Inner Attenuation Distance and the Attenuation Distance.
Double Sided Toggle whether light is emitted from both sides of the area light.
IES Profiile This feature is deprecated.
Show Light Cone Show a cone in the scene to represent the lights current position and rotation.
Inputs
These properties control the core behaviours of the node.
| Parameter | Details |
|---|---|
| Colour | The colour of the light. |
| Brightness | How bright the light is. |
| Scattering Intensity | How much the light is scattered by the light, creating a simple fog around it. |
| Falloff Mode | Change how the light falloff is calculated.
|
| Inner Attenuation Distance | Inner distance within which the light remains at full strength |
| Attenuation Distance | Maximum distance the light reaches. |
| Falloff Power | Change how strong the falloff for the light is between the Inner Attenuation Distance and the Attenuation Distance. |
| Double Sided | Toggle whether light is emitted from both sides of the area light. |
| IES Profiile | This feature is deprecated. |
| Show Light Cone | Show a cone in the scene to represent the lights current position and rotation. |
| Name | Description | Typical Input |
|---|---|---|
| Object Node | Input an object from which the light will be emitted. | 3D Object |
| Projection Image | Add in an image to be projected by the light. Only functions with deferred rendering enabled. Useful for adding gobos to lights, or making a simple projector light. | Video Loader |
| Affected Nodes | Choose which nodes are affected by the light node. by default, all are affected. | 3D Object |
| Texture Projection Node | Controls the direction the image is projected from, independant of the light. Only functions if an image is being projected from the light. | Null |
| Multi-Source Controller | This feature is deprecated. | |
| Transform Modifiers | Apply the transforms of another node to this node. | Null |
| Target Node | Modifiy the rotations of the node to always direct the z axis towards the input. | Null |
| Local Transform Override | Apply the transforms of another node to this node, relative to its parent. | Null |