The first CGI clips and movies probably used all in-house developing software. There are packages nowadays to create cgi movies - which have 3d
modelling programs, shadowing/lighting, and everything needed for cgi. Hoaxers will have access to these programs but I think it'll depend on the
dynamics of the clip to see if it's truly a fake. Yet even if it were real, professionals may be able to get so close to the real deal that
everything could have a "cgi" label.

