This is used internally by SpotLights for calculating shadows.

Code Example

// create a WebGLRenderer and turn on shadows in the renderer const renderer = new v3d.WebGLRenderer(); renderer.shadowMap.enabled = true; renderer.shadowMap.type = v3d.PCFSoftShadowMap; // default v3d.PCFShadowMap // create a SpotLight and turn on shadows for the light const light = new v3d.SpotLight(0xffffff); light.castShadow = true; // default false scene.add(light); // set up shadow properties for the light light.shadow.mapSize.width = 512; // default light.shadow.mapSize.height = 512; // default = 0.5; // default = 500; // default light.shadow.focus = 1; // default // create a sphere that cast shadows (but does not receive them) const sphereGeometry = new v3d.SphereGeometry(5, 32, 32); const sphereMaterial = new v3d.MeshStandardMaterial({ color: 0xff0000 }); const sphere = new v3d.Mesh(sphereGeometry, sphereMaterial); sphere.castShadow = true; // default is false sphere.receiveShadow = false; //default scene.add(sphere); // create a plane that receives shadows (but does not cast them) const planeGeometry = new v3d.PlaneGeometry(20, 20, 32, 32); const planeMaterial = new v3d.MeshStandardMaterial({ color: 0x00ff00 }) const plane = new v3d.Mesh(planeGeometry, planeMaterial); plane.receiveShadow = true; scene.add(plane); // create a helper for the shadow camera (optional) const helper = new v3d.CameraHelper(; scene.add(helper);


The constructor creates a PerspectiveCamera to manage the shadow's view of the world.


See the base LightShadow class for common properties.

.camera : Camera

The light's view of the world. This is used to generate a depth map of the scene; objects behind other objects from the light's perspective will be in shadow.

The default is a PerspectiveCamera with near clipping plane at 0.5. The fov will track the angle property of the owning SpotLight via the update method. Similarly, the aspect property will track the aspect of the mapSize. If the distance property of the light is set, the far clipping plane will track that, otherwise it defaults to 500.

.useMinFov90 : Boolean

Makes the shadow's camera vertical field of view 90 degrees even for spot lights with a cone more narrow than that. Default is false.

.focus : Float

Used to focus the shadow camera. The camera's field of view is set as a percentage of the spotlight's field-of-view. Range is [0, 1]. Default is 1.0.

.isSpotLightShadow : Boolean

Read-only flag to check if a given object is of type SpotLightShadow.


See the base LightShadow class for common methods.


The set shadow param puzzle allows to enable/disable casting or receiving shadows in a visual manner.


For more info on how to obtain the source code of this module see this page.