bkev said:

Are you sure the MCP was CGI? I was under the impression that Tron, ironically, had very little CG in it

IIRC, Tron has nearly 20 minutes of CGI in it. The rest is traditional matte paintings, and some of the most labor intensive backlit hand drawn animation ever done for a film.

The MCP was all CGI, except for right before he derezzed. ;)

The scenes where he's wrapped around Sark on the carrier are a series of CGI generated frames that were used like animation cels to make him speak.