terrain_chunk = 0; is what I'm using and it DOES make a difference.
if I set it to 0 I get unchunked terrain which supports ent_fixnormals.
In A8.
But if ent_fixnormals() will also work on chunked terrain in future, I have no problem switching to chunked terrain
And yes, I did read the manual about ent_get/setvertex().
Left with the problem that the colission did not work and finding out that c_updatehull() fixes it. Had to do some forum search to get this answer.