Dynamic Tilemap To Render Texture

class Example extends Phaser.Scene
{
    layer;
    rt;

    preload ()
    {
        this.load.setBaseURL('https://cdn.phaserfiles.com/v385');
        this.load.image('tiles', 'assets/tilemaps/tiles/tmw_desert_spacing.png');
        this.load.tilemapTiledJSON('map', 'assets/tilemaps/maps/desert.json');
    }

    create ()
    {
        const map = this.make.tilemap({ key: 'map' });

        const tiles = map.addTilesetImage('Desert', 'tiles');

        this.layer = map.createLayer('Ground', tiles, 0, 0).setVisible(false);

        this.rt = this.add.renderTexture(400, 300, 800, 600);
    }

    update ()
    {
        this.rt.camera.rotation -= 0.01;

        this.rt.clear();

        this.rt.draw(this.layer);
    }
}

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

const game = new Phaser.Game(config);