A computer-implemented method of enabling communication between a first client and a second client mutually participating in a communication session, in which the second client, but not the first client, has an application for rendering multi-dimensional virtual environments, is claimed. The method includes transmitting to the second client information representing a plurality of objects in a multi-dimensional virtual environment, wherein the multi-dimensional virtual environment is rendered at the second client, and transmitting to the first client an image for display by a first client application in a web page, the image including a representation of the multi-dimensional virtual environment rendered at the second client. The second client has an application, distinct from the first client application, for rendering multi-dimensional virtual environments.