Skin shows filtration quite a bit; observe the freckles between film types. Both unfiltered. More blue sensitivity would make blemishes/freckles more prominent.

I don't have an outdoor tri-x photo for you, but

here's tmax 400:
http://www.apug.org/gallery1/showima...mageuser=36069

here's foma 100:
http://www.flickr.com/photos/1375969...n/photostream/