InsAsterix/InsAsterix/Library/PackageCache/com.unity.render-pipelines.universal@12.1.9/Documentation~/LightTypes.md

Freeform

Select the Freeform Light type to create a Light from an editable polygon with a spline editor. To begin editing your shape, select the Light and find the button in its Inspector window. Select it to enable the shape editing mode.

Add new control points by clicking the mouse along the inner polygon’s outline. Remove control points selecting the point and pressing the Delete key.

The following additional properties are available to the Freeform Light type.

Property	Function
Falloff	Adjust the amount the blending from solid to transparent, starting from the center of the shape to its edges.
Falloff Intensity	Adjusts the falloff curve of the Light.
Falloff Offset	Sets the offset for the outer falloff shape.

Freeform Light in edit mode	Resulting Light Effect

When creating a Freeform Light, take care to avoid self-intersection as this may cause unintended lighting results. Self-intersection may occur by creating outlines where edges cross one another, or by enlarging falloff until it overlaps itself. To prevent such issues, it is recommended to edit the shape of the Light until the conditions creating the self-intersection no longer occur.

Outline self-intersection in Edit mode.	Light effect with a black triangular artifact

Falloff overlap in Edit mode	Light effect with double lighted areas with overlapping falloff

Parametric

The Parametric light type has been deprecated. To convert existing Parametric lights to Freeform lights, Edit > Rendering > Lights > Upgrade Project/Scene URP Parametric Lights to Freeform

Sprite

Select the Sprite Light type to create a Light based on a selected Sprite by assigning the selected Sprite to the additional Sprite property.

Property	Function
Sprite	Select a Sprite as the Light source.

Selected Sprite	Resulting Light effect

Spot

Select the Spot Light type for great control over the angle and direction of the selected Light with the following additional properties.

Property	Function
Radius Inner	Set the inner radius here or with the gizmo. Light within the inner radius will be at maximum intensity.
Radius Outer	Set the outer radius here or with the gizmo. Light intensity decreases to zero as it approaches the outer radius.
Inner / Outer Spot Angle	Set the angles with this slider or with the gizmo. Light within the inner and outer angles will be at the intensity specified by inner and outer radius.

Point Light in Edit mode	Resulting Light effect

Global

Global Lights light all objects on the targeted sorting layers. Only one global Light can be used per Blend Style, and per sorting layer.