Group To Render Texture

var config = {
    type: Phaser.AUTO,
    parent: 'phaser-example',
    width: 800,
    height: 600,
    scene: {
        preload: preload,
        create: create
    }
};

var rt;

var game = new Phaser.Game(config);

function preload ()
{
        this.load.setBaseURL('https://cdn.phaserfiles.com/v355');
    this.load.spritesheet('invader1', 'assets/tests/invaders/invader1.png', { frameWidth: 32, frameHeight: 32 });
    this.load.spritesheet('invader2', 'assets/tests/invaders/invader2.png', { frameWidth: 44, frameHeight: 32 });
    this.load.spritesheet('invader3', 'assets/tests/invaders/invader3.png', { frameWidth: 48, frameHeight: 32 });
}

function create ()
{
    var invader1 = this.add.group({ key: 'invader1', frame: 0, repeat: 13, setXY: { x: 32, y: 100, stepX: 40 } });

    var invader2 = this.add.group([
        { key: 'invader2', frame: 0, repeat: 10, setXY: { x: 32, y: 148, stepX: 52 } },
        { key: 'invader2', frame: 0, repeat: 10, setXY: { x: 32, y: 148 + 48, stepX: 52 } }
    ]);

    var invader3 = this.add.group([
        { key: 'invader3', frame: 0, repeat: 9, setXY: { x: 32, y: 148+96, stepX: 58 } },
        { key: 'invader3', frame: 0, repeat: 9, setXY: { x: 32, y: 148+96+48, stepX: 58 } }
    ]);

    Phaser.Actions.IncX(invader1.getChildren(), 100);
    Phaser.Actions.IncX(invader2.getChildren(), 100);
    Phaser.Actions.IncX(invader3.getChildren(), 100);

    Phaser.Actions.SetTint(invader1.getChildren(), 0xff0000);
    Phaser.Actions.SetTint(invader2.getChildren(), 0x00ff00);
    Phaser.Actions.SetTint(invader3.getChildren(), 0x00ffff);

    rt = this.add.renderTexture(0, 0, 800, 600);

    rt.draw(invader1);
    rt.draw(invader2);
    rt.draw(invader3);

    //  Now we're drawn them to the Render Texture, we can hide them:

    invader1.toggleVisible();
    invader2.toggleVisible();
    invader3.toggleVisible();
}