Gif Creation

In the documentation there is an example to create a gif animation: https://doc.babylonjs.com/how_to/render_scene_on_a_png

 var imgNm = 0;
    scene.render();
    scene.registerAfterRender(function(){
        ground.rotation.y += 1 * Math.PI / 90;
        if(imgNm++ < 90) {
            BABYLON.Tools.CreateScreenshotUsingRenderTarget(engine, camera, 200);
        }
    });

But it does not work at all. This wants to download 90 PNG images instead of a gif image.

I think the documentation lacks information here like a PG that shows how to download a Gif image

PG here: https://www.babylonjs-playground.com/#ZQ1KCR#3