I don't know if they could cheap out. Because of the early CGI not all the effects look so good. I'm in the middle of a break on rewatching VOY but up til the mid point of season 3 there's still a lot of that soft video look to the show like TNG and DS9.
I don't know if the later seasons looked sharper or not. I can't recall offhand.
'If the Apocalypse starts, beep me!' - Buffy Summers
'The sky's the limit.....' Jean-Luc Picard, 'All Good Things'
courtesy of Saquist