The XRLightProbe interface of the WebXR Device API contains lighting information at a given point in the user's environment. You can get an XRLighting object using the XRSession.requestLightProbe() method.

This object doesn't itself contain lighting values, but it is used to collect lighting states for each XRFrame. See XRLightEstimate for the estimated lighting values for an XRLightProbe.

XRLightProbe.onreflectionchange

Event handler property for the reflectionchange event.

XRLightProbe.probeSpace Read only Experimental

An XRSpace tracking the position and orientation the lighting estimations are relative to.

None.

reflectionchange Experimental

Fired each time the estimated reflection cube map changes. (This happens when the user moves around and the environment's lighting changes.)

Use the XRSession.requestLightProbe() method to get a light probe.

const lightProbe = await xrSession.requestLightProbe();

Pass the light probe's probeSpace to XRFrame.getPose() to get a light probe for a pose.

const probePose = xrFrame.getPose(lightProbe.probeSpace, xrReferenceSpace);

Pass XRLightProbe to get a reflection cube map whenever the reflectionchange event fires. See also XRWebGLBinding.getReflectionCubeMap().

const glBinding = new XRWebGLBinding(xrSession, gl);
const lightProbe = await xrSession.requestLightProbe();
let glCubeMap = glBinding.getReflectionCubeMap(lightProbe);

lightProbe.addEventListener("reflectionchange", () => {
  glCubeMap = glBinding.getReflectionCubeMap(lightProbe);
});

• XRSession.requestLightProbe()