Camera Blur Shader

class Example extends Phaser.Scene
{
    constructor ()
    {
        super();
    }

    preload ()
    {
        this.load.setBaseURL('https://cdn.phaserfiles.com/v410');
        this.load.image('volcano', 'assets/pics/bw-face.png');
        this.load.image('hotdog', 'assets/sprites/hotdog.png');
    }

    create ()
    {
        const volcano = this.add.image(400, 300, 'volcano').setAlpha(0.5);
        const hotdog = this.add.image(400, 300, 'hotdog').setScrollFactor(0);

        this.cameras.main.filters.internal.addBlur();

        const extracam = this.cameras.add();

        this.cameras.main.ignore(hotdog);
        extracam.ignore(volcano);
    }
}

const config = {
    scale: { mode: Phaser.Scale.FIT },
    type: Phaser.WEBGL,
    parent: 'game-container',
    width: 800,
    height: 600,
    backgroundColor: '#000000',
    scene: Example
};

const game = new Phaser.Game(config);