Shadow Caster 2D

The Shadow Caster 2D component defines the shape and properties that a Light uses to determine its cast shadows. Add the Shadow Caster 2D component to a GameObject by going to menu: Component > Rendering > 2D > Shadow Caster 2D.

Property	Function
Use Renderer Silhouette	Enable this and Self Shadows to include the GameObject Renderer's silhouette as part of the shadow. Enable this and disable Self Shadows to exclude the Renderer's silhouette from the shadow. This option is only available when a valid Renderer is present.
Casts Shadows	Enable this to have the Renderer cast shadows.
Self Shadows	Enable this to have the Renderer cast shadows on itself.

Use Renderer Silhouette disabled, Self Shadow disabled	Use Renderer Silhouette enabled, Self Shadow disabled
Use Renderer Silhouette disabled, Self Shadows enabled	Use Renderer Silhouette enabled, Self Shadows enabled

Composite Shadow Caster 2D

The Composite Shadow Caster 2D merges the shape of multiple Shadow Caster 2Ds together as a single Shadow Caster 2D. Add the Composite Shadow Caster 2D component to a GameObject by going to menu: Component > Rendering > 2D > Composite Shadow Caster 2D, then parent GameObjects with the Shadow Caster 2D component to it. The Composite component merges all Shadow Caster 2Ds within this hierarchy, including any Shadow Caster 2Ds on the parent as well.

Without Composite Shadow Caster 2D	With Composite Shadow Caster 2D