light

Note: This documentation is for the old 0.2.0 version of A-Frame. Check out the documentation for the current 0.6.0 version

The light component defines the entity as a source of light. Light affects all materials that have not specified a flat shading model with shader: flat. Note that lights are computationally expensive and the number of lights in a scene should be limited.

<a-entity light="color: #AFA; intensity: 1.5" position="-1 1 0"></a-entity>

By default, A-Frame scenes inject default lighting, an ambient light and a directional light. These default lights are visible in the DOM with the data-aframe-default-light attribute. Whenever any lights are added, the default lights are removed from the scene.

Properties

We will go through the different types of lights and their respective properties one by one.

Property Description Default Value
type One of ambient, directional, hemisphere, point, spot. directional
color Light color. #fff

Ambient

Ambient lights are applied to all entities in the scene globally. They are defined only by the color property. And, position, rotation, and scale have no effect on ambient lights.

It is recommended to have some form of ambient light such that shadowed areas are not completely black and to mimic indirect lighting.

<a-entity light="type: ambient; color: #CCC"></a-entity>

Directional

Directional lights can be thought of as a light source infinitely far away, but shining from a specific direction, like the sun. Thus, absolute position do not have an effect on the intensity of the light on an entity. We can specify the direction using the position component.

The example below creates a light source shining from the upper-left at a 45-degree angle. Note that because only the vector matters, position="-100 100 0" and position="-1 1 0" are equivalent.

<a-entity light="type: directional; color: #EEE; intensity: 0.5" position="-1 1 0"></a-entity>
Property Description Default Value
intensity Light strength. 1.0

Hemisphere

Hemisphere lights can be thought of as an ambient light, but with two colors of light, one from above (color) and one from below (groundColor). This can be useful for scenes with two distinct lighting colors (e.g., a grassy field under a gray sky).

<a-entity light="type: hemisphere; color: #33C; groundColor: #3C3; intensity: 2"></a-entity>
Property Description Default Value
groundColor Light color from below. #fff
intensity Light strength. 1.0

Point

Point lights, unlike directional lights, are omni-directional and affect materials depending on their position and distance. They can be thought of as a light bulb. The closer the light bulb gets to an object, the greater the object is lit.

<a-entity light="type: point; intensity: 0.75; distance: 50; decay: 2"
position="0 10 10"></a-entity>
Property Description Default Value
decay Amount the light dims along the distance of the light. 1.0
distance Distance where intensity becomes 0. If distance is 0, then the point light does not decay with distance. 0.0
intensity Light strength. 1.0

Spot

Spot lights are like point lights in the sense that they affect materials depending on its position and distance, but spot lights are not omni-directional. They mainly cast light in one direction, like the Bat-Signal.

<a-entity light="type: spot; angle: 45"></a-entity>
Property Description Default Value
angle Maximum extent of spot light from its direction (in degrees). 60
decay Amount the light dims along the distance of the light. 1.0
distance Distance where intensity becomes 0. If distance is 0, then the point light does not decay with distance. 0.0
exponent Rapidity of falloff of light from its target direction. 10.0
intensity Light strength. 1.0