Mmmmm...., very interesting. Just ran a testset with panos in mountainous area (steep road), and it doesn't seem to matter at all.
The Pitch and Roll only have been applied on
Set1 with PTStitcher and then in the KrPano viewer I have added PREALIGN with only heading, like:
0|hhh|0
For
Set2 I have applied all at once in KrPano, using PREALIGN like
ppp|hhh|rrr
And the outcome is totally the same! So, either Klaus is applying Pitch and Roll first and then heading with the PREALIGN (which would make me very happy :-))
Or our assumption of application is wrong and it simply doesn't matter in which order it is applied, but that would also contradict explanations on for instance:
http://www.euclideanspace.com/maths/geom…euler/index.htm