Notch Notch Manual 0.9.23
 Light | Dark
Area Lights From Polygons

Area Lights From Polygons

Emit light from mesh rectangular 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.


These properties control the core behaviours of the node.

ColourThe colour of the light.
BrightnessHow bright the light is.
Scattering IntensityHow much the light is scattered by the light, creating a simple fog around it.
Falloff ModeChange 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 DistanceInner distance within which the light remains at full strength
Attenuation DistanceMaximum distance the light reaches.
Falloff PowerChange how strong the falloff for the light is between the Inner Attenuation Distance and the Attenuation Distance.
Double SidedToggle whether light is emitted from both sides of the area light.
IES ProfiileThis feature is deprecated.
Show Light ConeShow a cone in the scene to represent the lights current position and rotation.


NameDescriptionTypical Input
Object NodeInput an object from which the light will be emitted.3D Object
Projection ImageAdd 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 NodesChoose which nodes are affected by the light node. by default, all are affected.3D Object
Texture Projection NodeControls 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 ControllerThis feature is deprecated.
Transform ModifiersApply the transforms of another node to this node.Null
Target NodeModifiy the rotations of the node to always direct the z axis towards the input.Null
Local Transform OverrideApply the transforms of another node to this node, relative to its parent.Null