When building a signal or a sign in a tunnel facing diagonally, the tunnel internal graphics face straight.
Thank you for the report. This will have to wait a little while to be fixed, however, as I am now away from home for Christmas, where I do not have access to my usual development computer, and can only easily work on pakset matters.
Signals always face straight. Even on diagonal ways outside of tunnel. It is a limitation of simutrans engine. Can you compare the appearance of signals inside and outside of tunnel?
I think that what Rollermaterial means is not that the signals themselves face straight (which is expected as you describe), but that the tunnel walls also face straight - is that correct?
Yes, it is.
Thank you for clarifying; as indicated before, I shall have to attend to this and other reported bugs when I return from my Christmas break.
I think that I have now fixed this; would you be able to re-test?