6. The method of claim 1 wherein generating the progressed image further comprises: selecting a transition image that is more revealing of the visual identity of the user than the graphical rendition; capturing expressive input via an input stream; and applying the expressive input to the transition image to form the progressed image in each frame of the second series of image frames.
1. A computer implemented method for generating image data associated with a user comprising: selecting a graphical rendition corresponding to a user that obscures a visual identity of the user; receiving an indication of active movements applicable to the selected graphical rendition and applicable to the progressed image; rendering the graphical rendition in each frame of a first series of image frames as a rendered image depicting the active movements; selecting a progressed image that is more revealing of the visual identity of the user than the graphical rendition; receiving an initiator signal provided by the user to begin transforming the rendered image to the progressed image; in response to receipt of the user-provided initiator signal, generating the progressed image depicting the active movements in each frame of a second series of image frames concurrently with the first series of image frames; further in response to the user-provided initiator signal, generating a third series of image frames depicting the active movements, each frame in the third series of image frames being generated by combining a frame from the first series of image frames depicting the active movements with a corresponding frame from the second series of image frames depicting the active movements, where the combining is performed by progressive interpolation to cause the third series of image frames to progress from the rendered image to the progressed image while maintaining the active movements; and rendering the third series of image frames.