It is entirely possible that you can get this effect with originals that are straight and true. In which case the problem may lie with the stitching method which your software chooses. Some programs offer little or no option, some (autopano e.g.) offer four or five; spherical, cylinder, Mercator and ...most suitably for countering distortion, planar interpolation. Just a thought and apologies if you've already trodden this path.
Graham
|