 || 2;
		let height = window.innerHeight || 2;

		const canvas = document.createElement('canvas');
		canvas.width = width;
		canvas.height = height;
		document.body.appendChild(canvas);

		const backRenderTarget = new t3d.RenderTargetBack(canvas);

		const contextParams = { antialias: true, alpha: false };
		const gl = canvas.getContext('webgl2', contextParams) || canvas.getContext('webgl', contextParams);
		const renderer = new t3d.WebGLRenderer(gl);

		renderer.setClearColor(0.6, 0.6, 0.6, 1);

		const sc