[James2001]

One of those articles claims that the ident was actually rendered straight to 35mm by the company in the US, but that can't have been the case, because there'd be film artifacts- grain, dirt, scratches, weave etc. on the idents, which there isn't, it's quite clearly rendered straight to video. The hand coloured versions are clearly on film though, maybe that's where the confusion came in.

I have seen some CGI idents that are clearly sourced from film (the 1985 STV thistle ident for example), and I've seen filmed transfers of some other 80s ITV CG idents, when they were attatched to a programme physically edited on film, but Channel 4's ident wouldn't have needed that.