How to Detect a portion of object in Camera or not ?

I can detect the center of the object whether it is in camera or not . Even tried to check 9 positions of an object whether they are in camera or not but sometimes this doesn’t full fill my intention.
Note: (Sorry for the bad english) .

How much detail do you need? You could do it by creating a “sphere” around your object by just saying if it is within a specific radius from the center.

Otherwise you are getting into some hairier territory.

Luckily unity has you covered: