Matte Paintings

[neatoman]

So I've noticed that this show sometimes paints in details, entire backgrounds and sometimes (these are the most obvious ones) characters rather than render them in CGI like most other things. The reason is obvious, creating assets in CGI is the most expensive part of TV cartoon and thus this needs to be done in order to prevent the budget from being drained on stuff that isn't likely to be reused.

However, after rewatching season 2 on DVD, I realised that it happens a lot more than I used to think when watching the inferior quality online streams. How many have you noticed?