Hi guys. This is probably a very common problem, but I can't find any useful resource on the web :/ I'm building a script that check the visibility of all the faces of a model from a certain camera angle and deletes them if needed. In this case 'visibility' is just testing if the face is 'facing' the camera, not an actual…
careful about that polyInfo as it will give you the normal orientation pre-transform IIRC. Also, depending what you're aiming at, you'll have trouble to get the normal you're interested in for non planar n-gons (4+ edges). I can dig up some stuff from scripts I've made if you want to do it the hard way if you're interested.