function updateSettings( worker ) {

		worker.postMessage( {

			init: [ canvasWidth, canvasHeight ],
			worker: worker.id,
			// workers: pool.length,
			blockSize: blockSize

		} );

	}
RaytracingRenderer renders by raytracing it's scene. However, it does not
compute the pixels itself but it hands off and coordinates the taks for workers.
The workers compute the pixel values and this renderer simply paints it to the Canvas.

@author zz85 / http://github.com/zz85