Light 2D

A Light 2D is a glowing light at its object's position: a torch, a lamp, a flashlight beam. The first Light 2D you add to a screen makes the whole screen dark, and every light then shines a soft hole through that darkness. Games only.

Settings

Setting	What it does
shape	circle glows in every direction. arc and cone cut the circle down to a slice: arc starts wide (a lamp's spill), cone starts narrow (a flashlight). freeform is an outline you draw yourself.
radius (px)	How far the light reaches.
direction (angle°, sweep°)	Shown for arc and cone. angle° is the way the slice faces (0 is right). sweep° is how wide it is. You can set any width, whichever shape you started from.
outline (Edit Shape)	Shown for freeform. Click Edit Shape, then work right in the Scene: drag a point to move it, double-click a point to delete it (3 points minimum), double-click an edge to add a point. Click again to stop editing. The outline moves with the object and fades toward its centre.
colour	The light's colour. It's always drawn fully opaque, so use intensity × for brightness, not the colour's opacity.
intensity ×	Brightness, from 0 to 2. 1 is normal.
falloff	How soft the edge is. Low gives a solid core with a crisp edge, high gives a soft glow that fades from the middle out.

Blocking the light

Give a wall, crate or pillar a Collider and tick its casts shadow. That object then blocks the glow, using its own box or circle shape. Shadows are hard-edged.

Good to know

• A screen shows up to 8 lights at once.
• Works on both Wear OS and Apple Watch. Turn a light on or off during play with Enable Component / Disable Component, or by hiding or showing its object. A light whose box is unticked in the Inspector stays off.
• A light on a spawned object shines too (put it on the prefab's root object), but it doesn't cast shadows.
• Light 2D is a Game feature. It doesn't appear in App or Watch Face projects.