1. A method comprising: transmitting to a first client computer a first representation of a virtual world including two-dimensional content; and transmitting to one or more second client computers a second representation of the virtual world including three-dimensional content, wherein a first avatar associated with the first client computer is located in a location of the virtual world depicted in the three-dimensional content, and wherein the second representation includes an indication that the two-dimensional content has been transmitted to the first client computer.