<!-- Just ignore my rambling if you've solved it on your own. -->

Ah, wall-walking! Thanks for the screenshot.

I know how to work with a bunch of vectors here. This figures out a new "forward" vector for your character given an old "forward" vector, an old "floor" normal, and a new "wall" normal that you can get from c_move (untested):
Code:

---

var tempang[3];
var tempang2[3];
 
// in a function...
   // figure out how the old normal needs to be rotated to change to the new normal
   vec_to_angle(tempang, OldNormal);
   vec_inverse(tempang);
   vec_rotate(NewNormal, tempang);
   // you could reuse tempang here but I used a different variable because it means something different now
   vec_to_angle(tempang2, NewNormal);   
   
   // rotate the old forward vector the same way
   vec_set(NewForward, OldForward);
   vec_rotate(NewForward, tempang2);
// ...rest of function

---

The hard part is turning the new forward vector into an Euler angle. Using vec_to_angle would give you the right pan and tilt, but then you'd have to adjust roll.

You could easily figure out top and side vectors (top = NewNormal; left = NewForward CROSS NewNormal) if that info is needed. I've never had much luck converting vectors to Euler angles, though.

Appriciate the input once again Futurulus
The methode like you described it seems logic if you think about it indeed but coverting a vector into an angle using vec_to_angle works good when not adjusting pan, tilt and roll at the same time which is quite difficult in a situation like GL. Therefore you need to inverse pan,tilt and roll to solve that part of the problem but eventually it will lead into inaccurate angles when shiften from normal again due to GL. Anyway, the methode I maded is good enough. It's located in the UR thread

Cheers

Frazzle