I am doing my multivariable calculus course right now, and quite often the problems require either a good ability to visualize 3d functions in your head or have good graphing software - the first of course leading to deeper understanding.
So, the question is really: do you NEED to be good at seeing 3d functions in your head, or is it okay to just let the computer graph it, as long as you know the math behind it? #science source