Anyway, as for Hume, while IMDB is user-based and often has inaccurate data, this whole thing is very strange--i mean, why would someone make up such a wild story? It has to come from somewhere. And it certainly is believable.
My first thought was what someone else said: that some of footage that was shot last indeed looks cheap--but then i realised the whole movie looks inconsistently cheap and glossy, depending on shot to shot. All the scenes in the throne room are lit horribly--partially due to the fact that it was an entirely black set that needed to be flooded with light to read detail--and most the shots are just kind of bland and rough. This is because Marquand said he wanted the rough, fastly-shot look of ANH, and Lucas wanted the shoot done as quickly as possible, so it was sort of guerrilla style, just do the minimum lighting, do a take and if you don't get it then move on. On the other hand, a scene like Luke's unmasking of Vader--which was directed by Lucas--is lit in an understated but appropriately dramatic way, and some of the Jabbas Palace stuff is interestingly done.