void Start()
    {
        int       width  = 800;
        int       height = 600;
        Texture2D tex    = new Texture2D(width, height, TextureFormat.RGB24, false);

        RayTracing.Scene scene = new RayTracing.Scene();
        scene.AddSphere(new RayTracing.Sphere()
        {
            Position = new Vector3(0, 0, -10), Radius = 2
        });

        RayTracing.Camera camera = new RayTracing.Camera(2, 1, Vector3.zero, new RayTracing.Screen(width, height));
        camera.TakePhoto(scene);
        Color[] texColors = camera.CameraTexture;
        tex.SetPixels(texColors);

        tex.Apply();
        material.mainTexture = tex;
    }