Thanks heaps dahart for your extremely thoughtful reply! I totally see what you're getting at and I feel silly for having even accidentally suggested that Morgan was not across anything tbh!

I still think that even an extremely cursory mention about how to make pixels like 'We will average samples from N rays within each pixel as our antialiasing strategy, this is equivalent to box-filtering (see citations [X][Y][Z])" I think something like that would be pretty helpful just to connect the dots between the amazing ideas in the book and actual-pixel-production. (Filtering/signal-processing is not totally a pet-favorite idea btw, I just think it's good to have a mention of it so that it's at least connected with the rest of a graphics-HOWTO in a non-abstract way)

Very interesting point about AI-based denoisers too.. definitely changes the pixel-filtering situation in an interesting way! Although I'm super interested in it I'm sticking my fingers in my ears about that for the moment!