Tilt lens for panoramic

[Harold Wong <hgw@xxxxxxxxxxxxx>]

I know in the past, people have talked about using tilt lenses for landscape
panoramic photography. This week, I rented a Canon TS 45mm lens to play
around with and found it not what I expected. My original impression
was, if I place my camera perfectly parallel to the earth, I can tilt
the lens down to take out some of the sky and bring in more of the
landscape. While the image in the viewfinder is what I expected, I
noticed a "curving into position" of the landscape as I swing the
camera. Since I shoot multiple frames and stitch them together later,
this "curving into position" or distortion is not going to work. How
have others used tilt lens in the past? Thanks.

Harold