function MaterialRenderer()
{
	PreviewRenderer.call(this);

	// Camera
	this.camera = new OrthographicCamera(2.15, 1);

	// Geometry
	this.geometry = new SphereGeometry(1, 16, 16);

	// Mesh
	this.mesh = new Mesh(this.geometry);
	this.scene.add(this.mesh);

	// Points
	this.points = new Points(this.geometry);
	this.scene.add(this.points);

	// Line
	this.line = new Line(this.geometry);
	this.scene.add(this.line);

	// Sprite
	this.sprite = new Sprite();
	this.sprite.scale.set(2, 2, 1);
	this.scene.add(this.sprite);

	// Ambient light
	var ambient = new AmbientLight(0x999999);
	this.scene.add(ambient);

	// Point light
	var point = new PointLight(0x999999);
	point.position.set(-0.5, 1, 1.5);
	this.scene.add(point);
}
The material renderer is used to generate preview thumbnails.

@class MaterialRenderer
@extends {PreviewRenderer}