As I have mentioned from time to time, I'm not a big fan of hard-edge, highly detailed painting. I can respect it, and I prefer it to most modernist painting, but don't love it for the most part.
While visiting the exhibit I took snapshots using my iPhone of reference images followed by close-ups of Pre-Raphaelite painting on display. Some are shown below: click on them to enlarge considerably to view that painstakingly detailed work.
Millais later painted more conventionally -- many portraits -- and eventually became president of the Royal Academy.
Another fairly small painting.
A "finished study for a picture" Brown stated.
A well-known Pre-Raphaelite painting that yet again isn't large.
Not strictly Pre-Raphaelite style aside from being hard-edge.