Virtual reality (VR) is a rapidly growing technology. While VR delivered in a web browser is not yet commonplace, it will be in the near future. VRML, in the past, and X3D today, are intended for use in developing VR web applications. In order for VR to be delivered effectively over the web, it must be able to be rendered by modern mainstream web browsers. Languages such as VRML and X3D are conceived and developed with the aim of eventually achieving adoption by the World Wide Web Consortium (W3C) and web browser developers as a standard web language with widespread browser support.