Thank you 3Run! Now it works fine! But still I had to pass by the tilt, so it looks like this:

if(vec_dist(camera.x,player.x) > 3300){

vec_set(cpassby, vector (2900, 800, 200));// Keep below if-distance!!
vec_rotate(cpassby, vector(player.pan,0,0)); // Vector -> JUST PAN , NO TILT OR ROLL angles! <-
vec_add(cpassby, player.x);
}