Save Shader As Texture

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

var game = new Phaser.Game(config);

function preload ()
{
        this.load.setBaseURL('https://cdn.phaserfiles.com/v355');
    this.load.glsl('bundle', 'assets/shaders/bundle2.glsl.js');
}

function create ()
{
    //  Here we create our shader. It has a size of 128 x 128.
    var shader = this.add.shader('Marble', 0, 0, 128, 128);

    //  Now we tell it to render to a texture, instead of on the display list.
    //  The string given here is the key that is used when saving it to the Texture Manager:

    shader.setRenderToTexture('wibble');

    //  And now some images that use the texture

    this.add.image(200, 300, 'wibble');

    //  A scaled image
    this.add.image(400, 300, 'wibble').setScale(2);

    //  A tweened image
    var mover = this.add.image(600, 100, 'wibble');

    this.tweens.add({
        targets: mover,
        angle: 180,
        y: 500,
        ease: 'Sine.easeInOut',
        repeat: -1,
        yoyo: true,
        duration: 2000
    });
}